prototype.js

/*  Prototype JavaScript framework, version 1.7.1
 *  (c) 2005-2010 Sam Stephenson
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://www.prototypejs.org/
 *
 *--------------------------------------------------------------------------*/

var Prototype = {

    Version: '1.7.1',

    Browser: (function(){
        var ua = navigator.userAgent;
        var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';
        return {
            IE:             !!window.attachEvent && !isOpera,
            Opera:          isOpera,
            WebKit:         ua.indexOf('AppleWebKit/') > -1,
            Gecko:          ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,
            MobileSafari:   /Apple.*Mobile/.test(ua)
        }
    })(),

    BrowserFeatures: {
        XPath: !!document.evaluate,

        SelectorsAPI: !!document.querySelector,

        ElementExtensions: (function() {
            var constructor = window.Element || window.HTMLElement;
            return !!(constructor && constructor.prototype);
        })(),
        SpecificElementExtensions: (function() {
            if (typeof window.HTMLDivElement !== 'undefined')
                return true;

            var div = document.createElement('div'),
                form = document.createElement('form'),
                isSupported = false;

            if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {
                isSupported = true;
            }

            div = form = null;

            return isSupported;
        })()
    },

    ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script\\s*>',
    JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

    emptyFunction: function() { },

    K: function(x) { return x }
};

if (Prototype.Browser.MobileSafari)
    Prototype.BrowserFeatures.SpecificElementExtensions = false;
/* Based on Alex Arnell's inheritance implementation. */

var Class = (function() {

    var IS_DONTENUM_BUGGY = (function(){
        for (var p in { toString: 1 }) {
            if (p === 'toString') return false;
        }
        return true;
    })();

    function subclass() {};
    function create() {
        var parent = null, properties = $A(arguments);
        if (Object.isFunction(properties[0]))
            parent = properties.shift();

        function klass() {
            this.initialize.apply(this, arguments);
        }

        Object.extend(klass, Class.Methods);
        klass.superclass = parent;
        klass.subclasses = [];

        if (parent) {
            subclass.prototype = parent.prototype;
            klass.prototype = new subclass;
            parent.subclasses.push(klass);
        }

        for (var i = 0, length = properties.length; i < length; i++)
            klass.addMethods(properties[i]);

        if (!klass.prototype.initialize)
            klass.prototype.initialize = Prototype.emptyFunction;

        klass.prototype.constructor = klass;
        return klass;
    }

    function addMethods(source) {
        var ancestor   = this.superclass && this.superclass.prototype,
            properties = Object.keys(source);

        if (IS_DONTENUM_BUGGY) {
            if (source.toString != Object.prototype.toString)
                properties.push("toString");
            if (source.valueOf != Object.prototype.valueOf)
                properties.push("valueOf");
        }

        for (var i = 0, length = properties.length; i < length; i++) {
            var property = properties[i], value = source[property];
            if (ancestor && Object.isFunction(value) &&
                value.argumentNames()[0] == "$super") {
                var method = value;
                value = (function(m) {
                    return function() { return ancestor[m].apply(this, arguments); };
                })(property).wrap(method);

                value.valueOf = (function(method) {
                    return function() { return method.valueOf.call(method); };
                })(method);

                value.toString = (function(method) {
                    return function() { return method.toString.call(method); };
                })(method);
            }
            this.prototype[property] = value;
        }

        return this;
    }

    return {
        create: create,
        Methods: {
            addMethods: addMethods
        }
    };
})();
(function() {

    var _toString = Object.prototype.toString,
        _hasOwnProperty = Object.prototype.hasOwnProperty,
        NULL_TYPE = 'Null',
        UNDEFINED_TYPE = 'Undefined',
        BOOLEAN_TYPE = 'Boolean',
        NUMBER_TYPE = 'Number',
        STRING_TYPE = 'String',
        OBJECT_TYPE = 'Object',
        FUNCTION_CLASS = '[object Function]',
        BOOLEAN_CLASS = '[object Boolean]',
        NUMBER_CLASS = '[object Number]',
        STRING_CLASS = '[object String]',
        ARRAY_CLASS = '[object Array]',
        DATE_CLASS = '[object Date]',
        NATIVE_JSON_STRINGIFY_SUPPORT = window.JSON &&
            typeof JSON.stringify === 'function' &&
            JSON.stringify(0) === '0' &&
            typeof JSON.stringify(Prototype.K) === 'undefined';



    var DONT_ENUMS = ['toString', 'toLocaleString', 'valueOf',
        'hasOwnProperty', 'isPrototypeOf', 'propertyIsEnumerable', 'constructor'];

    var IS_DONTENUM_BUGGY = (function(){
        for (var p in { toString: 1 }) {
            if (p === 'toString') return false;
        }
        return true;
    })();

    function Type(o) {
        switch(o) {
            case null: return NULL_TYPE;
            case (void 0): return UNDEFINED_TYPE;
        }
        var type = typeof o;
        switch(type) {
            case 'boolean': return BOOLEAN_TYPE;
            case 'number':  return NUMBER_TYPE;
            case 'string':  return STRING_TYPE;
        }
        return OBJECT_TYPE;
    }

    function extend(destination, source) {
        for (var property in source)
            destination[property] = source[property];
        return destination;
    }

    function inspect(object) {
        try {
            if (isUndefined(object)) return 'undefined';
            if (object === null) return 'null';
            return object.inspect ? object.inspect() : String(object);
        } catch (e) {
            if (e instanceof RangeError) return '...';
            throw e;
        }
    }

    function toJSON(value) {
        return Str('', { '': value }, []);
    }

    function Str(key, holder, stack) {
        var value = holder[key];
        if (Type(value) === OBJECT_TYPE && typeof value.toJSON === 'function') {
            value = value.toJSON(key);
        }

        var _class = _toString.call(value);

        switch (_class) {
            case NUMBER_CLASS:
            case BOOLEAN_CLASS:
            case STRING_CLASS:
                value = value.valueOf();
        }

        switch (value) {
            case null: return 'null';
            case true: return 'true';
            case false: return 'false';
        }

        var type = typeof value;
        switch (type) {
            case 'string':
                return value.inspect(true);
            case 'number':
                return isFinite(value) ? String(value) : 'null';
            case 'object':

                for (var i = 0, length = stack.length; i < length; i++) {
                    if (stack[i] === value) {
                        throw new TypeError("Cyclic reference to '" + value + "' in object");
                    }
                }
                stack.push(value);

                var partial = [];
                if (_class === ARRAY_CLASS) {
                    for (var i = 0, length = value.length; i < length; i++) {
                        var str = Str(i, value, stack);
                        partial.push(typeof str === 'undefined' ? 'null' : str);
                    }
                    partial = '[' + partial.join(',') + ']';
                } else {
                    var keys = Object.keys(value);
                    for (var i = 0, length = keys.length; i < length; i++) {
                        var key = keys[i], str = Str(key, value, stack);
                        if (typeof str !== "undefined") {
                            partial.push(key.inspect(true)+ ':' + str);
                        }
                    }
                    partial = '{' + partial.join(',') + '}';
                }
                stack.pop();
                return partial;
        }
    }

    function stringify(object) {
        return JSON.stringify(object);
    }

    function toQueryString(object) {
        return $H(object).toQueryString();
    }

    function toHTML(object) {
        return object && object.toHTML ? object.toHTML() : String.interpret(object);
    }

    function keys(object) {
        if (Type(object) !== OBJECT_TYPE) { throw new TypeError(); }
        var results = [];
        for (var property in object) {
            if (_hasOwnProperty.call(object, property))
                results.push(property);
        }

        if (IS_DONTENUM_BUGGY) {
            for (var i = 0; property = DONT_ENUMS[i]; i++) {
                if (_hasOwnProperty.call(object, property))
                    results.push(property);
            }
        }

        return results;
    }

    function values(object) {
        var results = [];
        for (var property in object)
            results.push(object[property]);
        return results;
    }

    function clone(object) {
        return extend({ }, object);
    }

    function isElement(object) {
        return !!(object && object.nodeType == 1);
    }

    function isArray(object) {
        return _toString.call(object) === ARRAY_CLASS;
    }

    var hasNativeIsArray = (typeof Array.isArray == 'function')
        && Array.isArray([]) && !Array.isArray({});

    if (hasNativeIsArray) {
        isArray = Array.isArray;
    }

    function isHash(object) {
        return object instanceof Hash;
    }

    function isFunction(object) {
        return _toString.call(object) === FUNCTION_CLASS;
    }

    function isString(object) {
        return _toString.call(object) === STRING_CLASS;
    }

    function isNumber(object) {
        return _toString.call(object) === NUMBER_CLASS;
    }

    function isDate(object) {
        return _toString.call(object) === DATE_CLASS;
    }

    function isUndefined(object) {
        return typeof object === "undefined";
    }

    extend(Object, {
        extend:        extend,
        inspect:       inspect,
        toJSON:        NATIVE_JSON_STRINGIFY_SUPPORT ? stringify : toJSON,
        toQueryString: toQueryString,
        toHTML:        toHTML,
        keys:          Object.keys || keys,
        values:        values,
        clone:         clone,
        isElement:     isElement,
        isArray:       isArray,
        isHash:        isHash,
        isFunction:    isFunction,
        isString:      isString,
        isNumber:      isNumber,
        isDate:        isDate,
        isUndefined:   isUndefined
    });
})();
Object.extend(Function.prototype, (function() {
    var slice = Array.prototype.slice;

    function update(array, args) {
        var arrayLength = array.length, length = args.length;
        while (length--) array[arrayLength + length] = args[length];
        return array;
    }

    function merge(array, args) {
        array = slice.call(array, 0);
        return update(array, args);
    }

    function argumentNames() {
        var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]
            .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')
            .replace(/\s+/g, '').split(',');
        return names.length == 1 && !names[0] ? [] : names;
    }


    function bind(context) {
        if (arguments.length < 2 && Object.isUndefined(arguments[0]))
            return this;

        if (!Object.isFunction(this))
            throw new TypeError("The object is not callable.");

        var nop = function() {};
        var __method = this, args = slice.call(arguments, 1);

        var bound = function() {
            var a = merge(args, arguments), c = context;
            var c = this instanceof bound ? this : context;
            return __method.apply(c, a);
        };

        nop.prototype   = this.prototype;
        bound.prototype = new nop();

        return bound;
    }

    function bindAsEventListener(context) {
        var __method = this, args = slice.call(arguments, 1);
        return function(event) {
            var a = update([event || window.event], args);
            return __method.apply(context, a);
        }
    }

    function curry() {
        if (!arguments.length) return this;
        var __method = this, args = slice.call(arguments, 0);
        return function() {
            var a = merge(args, arguments);
            return __method.apply(this, a);
        }
    }

    function delay(timeout) {
        var __method = this, args = slice.call(arguments, 1);
        timeout = timeout * 1000;
        return window.setTimeout(function() {
            return __method.apply(__method, args);
        }, timeout);
    }

    function defer() {
        var args = update([0.01], arguments);
        return this.delay.apply(this, args);
    }

    function wrap(wrapper) {
        var __method = this;
        return function() {
            var a = update([__method.bind(this)], arguments);
            return wrapper.apply(this, a);
        }
    }

    function methodize() {
        if (this._methodized) return this._methodized;
        var __method = this;
        return this._methodized = function() {
            var a = update([this], arguments);
            return __method.apply(null, a);
        };
    }

    var extensions = {
        argumentNames:       argumentNames,
        bindAsEventListener: bindAsEventListener,
        curry:               curry,
        delay:               delay,
        defer:               defer,
        wrap:                wrap,
        methodize:           methodize
    };

    if (!Function.prototype.bind)
        extensions.bind = bind;

    return extensions;
})());



(function(proto) {


    function toISOString() {
        return this.getUTCFullYear() + '-' +
            (this.getUTCMonth() + 1).toPaddedString(2) + '-' +
            this.getUTCDate().toPaddedString(2) + 'T' +
            this.getUTCHours().toPaddedString(2) + ':' +
            this.getUTCMinutes().toPaddedString(2) + ':' +
            this.getUTCSeconds().toPaddedString(2) + 'Z';
    }


    function toJSON() {
        return this.toISOString();
    }

    if (!proto.toISOString) proto.toISOString = toISOString;
    if (!proto.toJSON) proto.toJSON = toJSON;

})(Date.prototype);


RegExp.prototype.match = RegExp.prototype.test;

RegExp.escape = function(str) {
    return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');
};
var PeriodicalExecuter = Class.create({
    initialize: function(callback, frequency) {
        this.callback = callback;
        this.frequency = frequency;
        this.currentlyExecuting = false;

        this.registerCallback();
    },

    registerCallback: function() {
        this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
    },

    execute: function() {
        this.callback(this);
    },

    stop: function() {
        if (!this.timer) return;
        clearInterval(this.timer);
        this.timer = null;
    },

    onTimerEvent: function() {
        if (!this.currentlyExecuting) {
            try {
                this.currentlyExecuting = true;
                this.execute();
                this.currentlyExecuting = false;
            } catch(e) {
                this.currentlyExecuting = false;
                throw e;
            }
        }
    }
});
Object.extend(String, {
    interpret: function(value) {
        return value == null ? '' : String(value);
    },
    specialChar: {
        '\b': '\\b',
        '\t': '\\t',
        '\n': '\\n',
        '\f': '\\f',
        '\r': '\\r',
        '\\': '\\\\'
    }
});

Object.extend(String.prototype, (function() {
    var NATIVE_JSON_PARSE_SUPPORT = window.JSON &&
        typeof JSON.parse === 'function' &&
        JSON.parse('{"test": true}').test;

    function prepareReplacement(replacement) {
        if (Object.isFunction(replacement)) return replacement;
        var template = new Template(replacement);
        return function(match) { return template.evaluate(match) };
    }

    function gsub(pattern, replacement) {
        var result = '', source = this, match;
        replacement = prepareReplacement(replacement);

        if (Object.isString(pattern))
            pattern = RegExp.escape(pattern);

        if (!(pattern.length || pattern.source)) {
            replacement = replacement('');
            return replacement + source.split('').join(replacement) + replacement;
        }

        while (source.length > 0) {
            if (match = source.match(pattern)) {
                result += source.slice(0, match.index);
                result += String.interpret(replacement(match));
                source  = source.slice(match.index + match[0].length);
            } else {
                result += source, source = '';
            }
        }
        return result;
    }

    function sub(pattern, replacement, count) {
        replacement = prepareReplacement(replacement);
        count = Object.isUndefined(count) ? 1 : count;

        return this.gsub(pattern, function(match) {
            if (--count < 0) return match[0];
            return replacement(match);
        });
    }

    function scan(pattern, iterator) {
        this.gsub(pattern, iterator);
        return String(this);
    }

    function truncate(length, truncation) {
        length = length || 30;
        truncation = Object.isUndefined(truncation) ? '...' : truncation;
        return this.length > length ?
            this.slice(0, length - truncation.length) + truncation : String(this);
    }

    function strip() {
        return this.replace(/^\s+/, '').replace(/\s+$/, '');
    }

    function stripTags() {
        return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');
    }

    function stripScripts() {
        return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
    }

    function extractScripts() {
        var matchAll = new RegExp(Prototype.ScriptFragment, 'img'),
            matchOne = new RegExp(Prototype.ScriptFragment, 'im');
        return (this.match(matchAll) || []).map(function(scriptTag) {
            return (scriptTag.match(matchOne) || ['', ''])[1];
        });
    }

    function evalScripts() {
        return this.extractScripts().map(function(script) { return eval(script); });
    }

    function escapeHTML() {
        return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');
    }

    function unescapeHTML() {
        return this.stripTags().replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');
    }


    function toQueryParams(separator) {
        var match = this.strip().match(/([^?#]*)(#.*)?$/);
        if (!match) return { };

        return match[1].split(separator || '&').inject({ }, function(hash, pair) {
            if ((pair = pair.split('='))[0]) {
                var key = decodeURIComponent(pair.shift()),
                    value = pair.length > 1 ? pair.join('=') : pair[0];

                if (value != undefined) value = decodeURIComponent(value);

                if (key in hash) {
                    if (!Object.isArray(hash[key])) hash[key] = [hash[key]];
                    hash[key].push(value);
                }
                else hash[key] = value;
            }
            return hash;
        });
    }

    function toArray() {
        return this.split('');
    }

    function succ() {
        return this.slice(0, this.length - 1) +
            String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
    }

    function times(count) {
        return count < 1 ? '' : new Array(count + 1).join(this);
    }

    function camelize() {
        return this.replace(/-+(.)?/g, function(match, chr) {
            return chr ? chr.toUpperCase() : '';
        });
    }

    function capitalize() {
        return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
    }

    function underscore() {
        return this.replace(/::/g, '/')
            .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2')
            .replace(/([a-z\d])([A-Z])/g, '$1_$2')
            .replace(/-/g, '_')
            .toLowerCase();
    }

    function dasherize() {
        return this.replace(/_/g, '-');
    }

    function inspect(useDoubleQuotes) {
        var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {
            if (character in String.specialChar) {
                return String.specialChar[character];
            }
            return '\\u00' + character.charCodeAt().toPaddedString(2, 16);
        });
        if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
        return "'" + escapedString.replace(/'/g, '\\\'') + "'";
    }

    function unfilterJSON(filter) {
        return this.replace(filter || Prototype.JSONFilter, '$1');
    }

    function isJSON() {
        var str = this;
        if (str.blank()) return false;
        str = str.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@');
        str = str.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
        str = str.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
        return (/^[\],:{}\s]*$/).test(str);
    }

    function evalJSON(sanitize) {
        var json = this.unfilterJSON(),
            cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
        if (cx.test(json)) {
            json = json.replace(cx, function (a) {
                return '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
            });
        }
        try {
            if (!sanitize || json.isJSON()) return eval('(' + json + ')');
        } catch (e) { }
        throw new SyntaxError('Badly formed JSON string: ' + this.inspect());
    }

    function parseJSON() {
        var json = this.unfilterJSON();
        return JSON.parse(json);
    }

    function include(pattern) {
        return this.indexOf(pattern) > -1;
    }

    function startsWith(pattern) {
        return this.lastIndexOf(pattern, 0) === 0;
    }

    function endsWith(pattern) {
        var d = this.length - pattern.length;
        return d >= 0 && this.indexOf(pattern, d) === d;
    }

    function empty() {
        return this == '';
    }

    function blank() {
        return /^\s*$/.test(this);
    }

    function interpolate(object, pattern) {
        return new Template(this, pattern).evaluate(object);
    }

    return {
        gsub:           gsub,
        sub:            sub,
        scan:           scan,
        truncate:       truncate,
        strip:          String.prototype.trim || strip,
        stripTags:      stripTags,
        stripScripts:   stripScripts,
        extractScripts: extractScripts,
        evalScripts:    evalScripts,
        escapeHTML:     escapeHTML,
        unescapeHTML:   unescapeHTML,
        toQueryParams:  toQueryParams,
        parseQuery:     toQueryParams,
        toArray:        toArray,
        succ:           succ,
        times:          times,
        camelize:       camelize,
        capitalize:     capitalize,
        underscore:     underscore,
        dasherize:      dasherize,
        inspect:        inspect,
        unfilterJSON:   unfilterJSON,
        isJSON:         isJSON,
        evalJSON:       NATIVE_JSON_PARSE_SUPPORT ? parseJSON : evalJSON,
        include:        include,
        startsWith:     startsWith,
        endsWith:       endsWith,
        empty:          empty,
        blank:          blank,
        interpolate:    interpolate
    };
})());

var Template = Class.create({
    initialize: function(template, pattern) {
        this.template = template.toString();
        this.pattern = pattern || Template.Pattern;
    },

    evaluate: function(object) {
        if (object && Object.isFunction(object.toTemplateReplacements))
            object = object.toTemplateReplacements();

        return this.template.gsub(this.pattern, function(match) {
            if (object == null) return (match[1] + '');

            var before = match[1] || '';
            if (before == '\\') return match[2];

            var ctx = object, expr = match[3],
                pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;

            match = pattern.exec(expr);
            if (match == null) return before;

            while (match != null) {
                var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/g, ']') : match[1];
                ctx = ctx[comp];
                if (null == ctx || '' == match[3]) break;
                expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);
                match = pattern.exec(expr);
            }

            return before + String.interpret(ctx);
        });
    }
});
Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

var $break = { };

var Enumerable = (function() {
    function each(iterator, context) {
        try {
            this._each(iterator, context);
        } catch (e) {
            if (e != $break) throw e;
        }
        return this;
    }

    function eachSlice(number, iterator, context) {
        var index = -number, slices = [], array = this.toArray();
        if (number < 1) return array;
        while ((index += number) < array.length)
            slices.push(array.slice(index, index+number));
        return slices.collect(iterator, context);
    }

    function all(iterator, context) {
        iterator = iterator || Prototype.K;
        var result = true;
        this.each(function(value, index) {
            result = result && !!iterator.call(context, value, index, this);
            if (!result) throw $break;
        }, this);
        return result;
    }

    function any(iterator, context) {
        iterator = iterator || Prototype.K;
        var result = false;
        this.each(function(value, index) {
            if (result = !!iterator.call(context, value, index, this))
                throw $break;
        }, this);
        return result;
    }

    function collect(iterator, context) {
        iterator = iterator || Prototype.K;
        var results = [];
        this.each(function(value, index) {
            results.push(iterator.call(context, value, index, this));
        }, this);
        return results;
    }

    function detect(iterator, context) {
        var result;
        this.each(function(value, index) {
            if (iterator.call(context, value, index, this)) {
                result = value;
                throw $break;
            }
        }, this);
        return result;
    }

    function findAll(iterator, context) {
        var results = [];
        this.each(function(value, index) {
            if (iterator.call(context, value, index, this))
                results.push(value);
        }, this);
        return results;
    }

    function grep(filter, iterator, context) {
        iterator = iterator || Prototype.K;
        var results = [];

        if (Object.isString(filter))
            filter = new RegExp(RegExp.escape(filter));

        this.each(function(value, index) {
            if (filter.match(value))
                results.push(iterator.call(context, value, index, this));
        }, this);
        return results;
    }

    function include(object) {
        if (Object.isFunction(this.indexOf))
            if (this.indexOf(object) != -1) return true;

        var found = false;
        this.each(function(value) {
            if (value == object) {
                found = true;
                throw $break;
            }
        });
        return found;
    }

    function inGroupsOf(number, fillWith) {
        fillWith = Object.isUndefined(fillWith) ? null : fillWith;
        return this.eachSlice(number, function(slice) {
            while(slice.length < number) slice.push(fillWith);
            return slice;
        });
    }

    function inject(memo, iterator, context) {
        this.each(function(value, index) {
            memo = iterator.call(context, memo, value, index, this);
        }, this);
        return memo;
    }

    function invoke(method) {
        var args = $A(arguments).slice(1);
        return this.map(function(value) {
            return value[method].apply(value, args);
        });
    }

    function max(iterator, context) {
        iterator = iterator || Prototype.K;
        var result;
        this.each(function(value, index) {
            value = iterator.call(context, value, index, this);
            if (result == null || value >= result)
                result = value;
        }, this);
        return result;
    }

    function min(iterator, context) {
        iterator = iterator || Prototype.K;
        var result;
        this.each(function(value, index) {
            value = iterator.call(context, value, index, this);
            if (result == null || value < result)
                result = value;
        }, this);
        return result;
    }

    function partition(iterator, context) {
        iterator = iterator || Prototype.K;
        var trues = [], falses = [];
        this.each(function(value, index) {
            (iterator.call(context, value, index, this) ?
                trues : falses).push(value);
        }, this);
        return [trues, falses];
    }

    function pluck(property) {
        var results = [];
        this.each(function(value) {
            results.push(value[property]);
        });
        return results;
    }

    function reject(iterator, context) {
        var results = [];
        this.each(function(value, index) {
            if (!iterator.call(context, value, index, this))
                results.push(value);
        }, this);
        return results;
    }

    function sortBy(iterator, context) {
        return this.map(function(value, index) {
            return {
                value: value,
                criteria: iterator.call(context, value, index, this)
            };
        }, this).sort(function(left, right) {
                var a = left.criteria, b = right.criteria;
                return a < b ? -1 : a > b ? 1 : 0;
            }).pluck('value');
    }

    function toArray() {
        return this.map();
    }

    function zip() {
        var iterator = Prototype.K, args = $A(arguments);
        if (Object.isFunction(args.last()))
            iterator = args.pop();

        var collections = [this].concat(args).map($A);
        return this.map(function(value, index) {
            return iterator(collections.pluck(index));
        });
    }

    function size() {
        return this.toArray().length;
    }

    function inspect() {
        return '#<Enumerable:' + this.toArray().inspect() + '>';
    }









    return {
        each:       each,
        eachSlice:  eachSlice,
        all:        all,
        every:      all,
        any:        any,
        some:       any,
        collect:    collect,
        map:        collect,
        detect:     detect,
        findAll:    findAll,
        select:     findAll,
        filter:     findAll,
        grep:       grep,
        include:    include,
        member:     include,
        inGroupsOf: inGroupsOf,
        inject:     inject,
        invoke:     invoke,
        max:        max,
        min:        min,
        partition:  partition,
        pluck:      pluck,
        reject:     reject,
        sortBy:     sortBy,
        toArray:    toArray,
        entries:    toArray,
        zip:        zip,
        size:       size,
        inspect:    inspect,
        find:       detect
    };
})();

function $A(iterable) {
    if (!iterable) return [];
    if ('toArray' in Object(iterable)) return iterable.toArray();
    var length = iterable.length || 0, results = new Array(length);
    while (length--) results[length] = iterable[length];
    return results;
}


function $w(string) {
    if (!Object.isString(string)) return [];
    string = string.strip();
    return string ? string.split(/\s+/) : [];
}

Array.from = $A;


(function() {
    var arrayProto = Array.prototype,
        slice = arrayProto.slice,
        _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available

    function each(iterator, context) {
        for (var i = 0, length = this.length >>> 0; i < length; i++) {
            if (i in this) iterator.call(context, this[i], i, this);
        }
    }
    if (!_each) _each = each;

    function clear() {
        this.length = 0;
        return this;
    }

    function first() {
        return this[0];
    }

    function last() {
        return this[this.length - 1];
    }

    function compact() {
        return this.select(function(value) {
            return value != null;
        });
    }

    function flatten() {
        return this.inject([], function(array, value) {
            if (Object.isArray(value))
                return array.concat(value.flatten());
            array.push(value);
            return array;
        });
    }

    function without() {
        var values = slice.call(arguments, 0);
        return this.select(function(value) {
            return !values.include(value);
        });
    }

    function reverse(inline) {
        return (inline === false ? this.toArray() : this)._reverse();
    }

    function uniq(sorted) {
        return this.inject([], function(array, value, index) {
            if (0 == index || (sorted ? array.last() != value : !array.include(value)))
                array.push(value);
            return array;
        });
    }

    function intersect(array) {
        return this.uniq().findAll(function(item) {
            return array.indexOf(item) !== -1;
        });
    }


    function clone() {
        return slice.call(this, 0);
    }

    function size() {
        return this.length;
    }

    function inspect() {
        return '[' + this.map(Object.inspect).join(', ') + ']';
    }

    function indexOf(item, i) {
        if (this == null) throw new TypeError();

        var array = Object(this), length = array.length >>> 0;
        if (length === 0) return -1;

        i = Number(i);
        if (isNaN(i)) {
            i = 0;
        } else if (i !== 0 && isFinite(i)) {
            i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
        }

        if (i > length) return -1;

        var k = i >= 0 ? i : Math.max(length - Math.abs(i), 0);
        for (; k < length; k++)
            if (k in array && array[k] === item) return k;
        return -1;
    }


    function lastIndexOf(item, i) {
        if (this == null) throw new TypeError();

        var array = Object(this), length = array.length >>> 0;
        if (length === 0) return -1;

        if (!Object.isUndefined(i)) {
            i = Number(i);
            if (isNaN(i)) {
                i = 0;
            } else if (i !== 0 && isFinite(i)) {
                i = (i > 0 ? 1 : -1) * Math.floor(Math.abs(i));
            }
        } else {
            i = length;
        }

        var k = i >= 0 ? Math.min(i, length - 1) :
            length - Math.abs(i);

        for (; k >= 0; k--)
            if (k in array && array[k] === item) return k;
        return -1;
    }

    function concat(_) {
        var array = [], items = slice.call(arguments, 0), item, n = 0;
        items.unshift(this);
        for (var i = 0, length = items.length; i < length; i++) {
            item = items[i];
            if (Object.isArray(item) && !('callee' in item)) {
                for (var j = 0, arrayLength = item.length; j < arrayLength; j++) {
                    if (j in item) array[n] = item[j];
                    n++;
                }
            } else {
                array[n++] = item;
            }
        }
        array.length = n;
        return array;
    }


    function wrapNative(method) {
        return function() {
            if (arguments.length === 0) {
                return method.call(this, Prototype.K);
            } else if (arguments[0] === undefined) {
                var args = slice.call(arguments, 1);
                args.unshift(Prototype.K);
                return method.apply(this, args);
            } else {
                return method.apply(this, arguments);
            }
        };
    }


    function map(iterator) {
        if (this == null) throw new TypeError();
        iterator = iterator || Prototype.K;

        var object = Object(this);
        var results = [], context = arguments[1], n = 0;

        for (var i = 0, length = object.length >>> 0; i < length; i++) {
            if (i in object) {
                results[n] = iterator.call(context, object[i], i, object);
            }
            n++;
        }
        results.length = n;
        return results;
    }

    if (arrayProto.map) {
        map = wrapNative(Array.prototype.map);
    }

    function filter(iterator) {
        if (this == null || !Object.isFunction(iterator))
            throw new TypeError();

        var object = Object(this);
        var results = [], context = arguments[1], value;

        for (var i = 0, length = object.length >>> 0; i < length; i++) {
            if (i in object) {
                value = object[i];
                if (iterator.call(context, value, i, object)) {
                    results.push(value);
                }
            }
        }
        return results;
    }

    if (arrayProto.filter) {
        filter = Array.prototype.filter;
    }

    function some(iterator) {
        if (this == null) throw new TypeError();
        iterator = iterator || Prototype.K;
        var context = arguments[1];

        var object = Object(this);
        for (var i = 0, length = object.length >>> 0; i < length; i++) {
            if (i in object && iterator.call(context, object[i], i, object)) {
                return true;
            }
        }

        return false;
    }

    if (arrayProto.some) {
        var some = wrapNative(Array.prototype.some);
    }


    function every(iterator) {
        if (this == null) throw new TypeError();
        iterator = iterator || Prototype.K;
        var context = arguments[1];

        var object = Object(this);
        for (var i = 0, length = object.length >>> 0; i < length; i++) {
            if (i in object && !iterator.call(context, object[i], i, object)) {
                return false;
            }
        }

        return true;
    }

    if (arrayProto.every) {
        var every = wrapNative(Array.prototype.every);
    }

    var _reduce = arrayProto.reduce;
    function inject(memo, iterator) {
        iterator = iterator || Prototype.K;
        var context = arguments[2];
        return _reduce.call(this, iterator.bind(context), memo);
    }

    if (!arrayProto.reduce) {
        var inject = Enumerable.inject;
    }

    Object.extend(arrayProto, Enumerable);

    if (!arrayProto._reverse)
        arrayProto._reverse = arrayProto.reverse;

    Object.extend(arrayProto, {
        _each:     _each,

        map:       map,
        collect:   map,
        select:    filter,
        filter:    filter,
        findAll:   filter,
        some:      some,
        any:       some,
        every:     every,
        all:       every,
        inject:    inject,

        clear:     clear,
        first:     first,
        last:      last,
        compact:   compact,
        flatten:   flatten,
        without:   without,
        reverse:   reverse,
        uniq:      uniq,
        intersect: intersect,
        clone:     clone,
        toArray:   clone,
        size:      size,
        inspect:   inspect
    });

    var CONCAT_ARGUMENTS_BUGGY = (function() {
        return [].concat(arguments)[0][0] !== 1;
    })(1,2);

    if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;

    if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;
    if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;
})();
function $H(object) {
    return new Hash(object);
};

var Hash = Class.create(Enumerable, (function() {
    function initialize(object) {
        this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);
    }


    function _each(iterator, context) {
        for (var key in this._object) {
            var value = this._object[key], pair = [key, value];
            pair.key = key;
            pair.value = value;
            iterator.call(context, pair);
        }
    }

    function set(key, value) {
        return this._object[key] = value;
    }

    function get(key) {
        if (this._object[key] !== Object.prototype[key])
            return this._object[key];
    }

    function unset(key) {
        var value = this._object[key];
        delete this._object[key];
        return value;
    }

    function toObject() {
        return Object.clone(this._object);
    }



    function keys() {
        return this.pluck('key');
    }

    function values() {
        return this.pluck('value');
    }

    function index(value) {
        var match = this.detect(function(pair) {
            return pair.value === value;
        });
        return match && match.key;
    }

    function merge(object) {
        return this.clone().update(object);
    }

    function update(object) {
        return new Hash(object).inject(this, function(result, pair) {
            result.set(pair.key, pair.value);
            return result;
        });
    }

    function toQueryPair(key, value) {
        if (Object.isUndefined(value)) return key;

        var value = String.interpret(value);

        value = value.gsub(/(\r)?\n/, '\r\n');
        value = encodeURIComponent(value);
        value = value.gsub(/%20/, '+');
        return key + '=' + value;
    }

    function toQueryString() {
        return this.inject([], function(results, pair) {
            var key = encodeURIComponent(pair.key), values = pair.value;

            if (values && typeof values == 'object') {
                if (Object.isArray(values)) {
                    var queryValues = [];
                    for (var i = 0, len = values.length, value; i < len; i++) {
                        value = values[i];
                        queryValues.push(toQueryPair(key, value));
                    }
                    return results.concat(queryValues);
                }
            } else results.push(toQueryPair(key, values));
            return results;
        }).join('&');
    }

    function inspect() {
        return '#<Hash:{' + this.map(function(pair) {
            return pair.map(Object.inspect).join(': ');
        }).join(', ') + '}>';
    }

    function clone() {
        return new Hash(this);
    }

    return {
        initialize:             initialize,
        _each:                  _each,
        set:                    set,
        get:                    get,
        unset:                  unset,
        toObject:               toObject,
        toTemplateReplacements: toObject,
        keys:                   keys,
        values:                 values,
        index:                  index,
        merge:                  merge,
        update:                 update,
        toQueryString:          toQueryString,
        inspect:                inspect,
        toJSON:                 toObject,
        clone:                  clone
    };
})());

Hash.from = $H;
Object.extend(Number.prototype, (function() {
    function toColorPart() {
        return this.toPaddedString(2, 16);
    }

    function succ() {
        return this + 1;
    }

    function times(iterator, context) {
        $R(0, this, true).each(iterator, context);
        return this;
    }

    function toPaddedString(length, radix) {
        var string = this.toString(radix || 10);
        return '0'.times(length - string.length) + string;
    }

    function abs() {
        return Math.abs(this);
    }

    function round() {
        return Math.round(this);
    }

    function ceil() {
        return Math.ceil(this);
    }

    function floor() {
        return Math.floor(this);
    }

    return {
        toColorPart:    toColorPart,
        succ:           succ,
        times:          times,
        toPaddedString: toPaddedString,
        abs:            abs,
        round:          round,
        ceil:           ceil,
        floor:          floor
    };
})());

function $R(start, end, exclusive) {
    return new ObjectRange(start, end, exclusive);
}

var ObjectRange = Class.create(Enumerable, (function() {
    function initialize(start, end, exclusive) {
        this.start = start;
        this.end = end;
        this.exclusive = exclusive;
    }

    function _each(iterator, context) {
        var value = this.start;
        while (this.include(value)) {
            iterator.call(context, value);
            value = value.succ();
        }
    }

    function include(value) {
        if (value < this.start)
            return false;
        if (this.exclusive)
            return value < this.end;
        return value <= this.end;
    }

    return {
        initialize: initialize,
        _each:      _each,
        include:    include
    };
})());



var Abstract = { };


var Try = {
    these: function() {
        var returnValue;

        for (var i = 0, length = arguments.length; i < length; i++) {
            var lambda = arguments[i];
            try {
                returnValue = lambda();
                break;
            } catch (e) { }
        }

        return returnValue;
    }
};

var Ajax = {
    getTransport: function() {
        return Try.these(
            function() {return new XMLHttpRequest()},
            function() {return new ActiveXObject('Msxml2.XMLHTTP')},
            function() {return new ActiveXObject('Microsoft.XMLHTTP')}
        ) || false;
    },

    activeRequestCount: 0
};

Ajax.Responders = {
    responders: [],

    _each: function(iterator, context) {
        this.responders._each(iterator, context);
    },

    register: function(responder) {
        if (!this.include(responder))
            this.responders.push(responder);
    },

    unregister: function(responder) {
        this.responders = this.responders.without(responder);
    },

    dispatch: function(callback, request, transport, json) {
        this.each(function(responder) {
            if (Object.isFunction(responder[callback])) {
                try {
                    responder[callback].apply(responder, [request, transport, json]);
                } catch (e) { }
            }
        });
    }
};

Object.extend(Ajax.Responders, Enumerable);

Ajax.Responders.register({
    onCreate:   function() { Ajax.activeRequestCount++ },
    onComplete: function() { Ajax.activeRequestCount-- }
});
Ajax.Base = Class.create({
    initialize: function(options) {
        this.options = {
            method:       'post',
            asynchronous: true,
            contentType:  'application/x-www-form-urlencoded',
            encoding:     'UTF-8',
            parameters:   '',
            evalJSON:     true,
            evalJS:       true
        };
        Object.extend(this.options, options || { });

        this.options.method = this.options.method.toLowerCase();

        if (Object.isHash(this.options.parameters))
            this.options.parameters = this.options.parameters.toObject();
    }
});
Ajax.Request = Class.create(Ajax.Base, {
    _complete: false,

    initialize: function($super, url, options) {
        $super(options);
        this.transport = Ajax.getTransport();
        this.request(url);
    },

    request: function(url) {
        this.url = url;
        this.method = this.options.method;
        var params = Object.isString(this.options.parameters) ?
            this.options.parameters :
            Object.toQueryString(this.options.parameters);

        if (!['get', 'post'].include(this.method)) {
            params += (params ? '&' : '') + "_method=" + this.method;
            this.method = 'post';
        }

        if (params && this.method === 'get') {
            this.url += (this.url.include('?') ? '&' : '?') + params;
        }

        this.parameters = params.toQueryParams();

        try {
            var response = new Ajax.Response(this);
            if (this.options.onCreate) this.options.onCreate(response);
            Ajax.Responders.dispatch('onCreate', this, response);

            this.transport.open(this.method.toUpperCase(), this.url,
                this.options.asynchronous);

            if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

            this.transport.onreadystatechange = this.onStateChange.bind(this);
            this.setRequestHeaders();

            this.body = this.method == 'post' ? (this.options.postBody || params) : null;
            this.transport.send(this.body);

            /* Force Firefox to handle ready state 4 for synchronous requests */
            if (!this.options.asynchronous && this.transport.overrideMimeType)
                this.onStateChange();

        }
        catch (e) {
            this.dispatchException(e);
        }
    },

    onStateChange: function() {
        var readyState = this.transport.readyState;
        if (readyState > 1 && !((readyState == 4) && this._complete))
            this.respondToReadyState(this.transport.readyState);
    },

    setRequestHeaders: function() {
        var headers = {
            'X-Requested-With': 'XMLHttpRequest',
            'X-Prototype-Version': Prototype.Version,
            'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
        };

        if (this.method == 'post') {
            headers['Content-type'] = this.options.contentType +
                (this.options.encoding ? '; charset=' + this.options.encoding : '');

            /* Force "Connection: close" for older Mozilla browsers to work
             * around a bug where XMLHttpRequest sends an incorrect
             * Content-length header. See Mozilla Bugzilla #246651.
             */
            if (this.transport.overrideMimeType &&
                (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
                headers['Connection'] = 'close';
        }

        if (typeof this.options.requestHeaders == 'object') {
            var extras = this.options.requestHeaders;

            if (Object.isFunction(extras.push))
                for (var i = 0, length = extras.length; i < length; i += 2)
                    headers[extras[i]] = extras[i+1];
            else
                $H(extras).each(function(pair) { headers[pair.key] = pair.value });
        }

        for (var name in headers)
            this.transport.setRequestHeader(name, headers[name]);
    },

    success: function() {
        var status = this.getStatus();
        return !status || (status >= 200 && status < 300) || status == 304;
    },

    getStatus: function() {
        try {
            if (this.transport.status === 1223) return 204;
            return this.transport.status || 0;
        } catch (e) { return 0 }
    },

    respondToReadyState: function(readyState) {
        var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

        if (state == 'Complete') {
            try {
                this._complete = true;
                (this.options['on' + response.status]
                    || this.options['on' + (this.success() ? 'Success' : 'Failure')]
                    || Prototype.emptyFunction)(response, response.headerJSON);
            } catch (e) {
                this.dispatchException(e);
            }

            var contentType = response.getHeader('Content-type');
            if (this.options.evalJS == 'force'
                || (this.options.evalJS && this.isSameOrigin() && contentType
                && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))
                this.evalResponse();
        }

        try {
            (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);
            Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);
        } catch (e) {
            this.dispatchException(e);
        }

        if (state == 'Complete') {
            this.transport.onreadystatechange = Prototype.emptyFunction;
        }
    },

    isSameOrigin: function() {
        var m = this.url.match(/^\s*https?:\/\/[^\/]*/);
        return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({
            protocol: location.protocol,
            domain: document.domain,
            port: location.port ? ':' + location.port : ''
        }));
    },

    getHeader: function(name) {
        try {
            return this.transport.getResponseHeader(name) || null;
        } catch (e) { return null; }
    },

    evalResponse: function() {
        try {
            return eval((this.transport.responseText || '').unfilterJSON());
        } catch (e) {
            this.dispatchException(e);
        }
    },

    dispatchException: function(exception) {
        (this.options.onException || Prototype.emptyFunction)(this, exception);
        Ajax.Responders.dispatch('onException', this, exception);
    }
});

Ajax.Request.Events =
    ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];








Ajax.Response = Class.create({
    initialize: function(request){
        this.request = request;
        var transport  = this.transport  = request.transport,
            readyState = this.readyState = transport.readyState;

        if ((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {
            this.status       = this.getStatus();
            this.statusText   = this.getStatusText();
            this.responseText = String.interpret(transport.responseText);
            this.headerJSON   = this._getHeaderJSON();
        }

        if (readyState == 4) {
            var xml = transport.responseXML;
            this.responseXML  = Object.isUndefined(xml) ? null : xml;
            this.responseJSON = this._getResponseJSON();
        }
    },

    status:      0,

    statusText: '',

    getStatus: Ajax.Request.prototype.getStatus,

    getStatusText: function() {
        try {
            return this.transport.statusText || '';
        } catch (e) { return '' }
    },

    getHeader: Ajax.Request.prototype.getHeader,

    getAllHeaders: function() {
        try {
            return this.getAllResponseHeaders();
        } catch (e) { return null }
    },

    getResponseHeader: function(name) {
        return this.transport.getResponseHeader(name);
    },

    getAllResponseHeaders: function() {
        return this.transport.getAllResponseHeaders();
    },

    _getHeaderJSON: function() {
        var json = this.getHeader('X-JSON');
        if (!json) return null;

        try {
            json = decodeURIComponent(escape(json));
        } catch(e) {
        }

        try {
            return json.evalJSON(this.request.options.sanitizeJSON ||
                !this.request.isSameOrigin());
        } catch (e) {
            this.request.dispatchException(e);
        }
    },

    _getResponseJSON: function() {
        var options = this.request.options;
        if (!options.evalJSON || (options.evalJSON != 'force' &&
            !(this.getHeader('Content-type') || '').include('application/json')) ||
            this.responseText.blank())
            return null;
        try {
            return this.responseText.evalJSON(options.sanitizeJSON ||
                !this.request.isSameOrigin());
        } catch (e) {
            this.request.dispatchException(e);
        }
    }
});

Ajax.Updater = Class.create(Ajax.Request, {
    initialize: function($super, container, url, options) {
        this.container = {
            success: (container.success || container),
            failure: (container.failure || (container.success ? null : container))
        };

        options = Object.clone(options);
        var onComplete = options.onComplete;
        options.onComplete = (function(response, json) {
            this.updateContent(response.responseText);
            if (Object.isFunction(onComplete)) onComplete(response, json);
        }).bind(this);

        $super(url, options);
    },

    updateContent: function(responseText) {
        var receiver = this.container[this.success() ? 'success' : 'failure'],
            options = this.options;

        if (!options.evalScripts) responseText = responseText.stripScripts();

        if (receiver = $(receiver)) {
            if (options.insertion) {
                if (Object.isString(options.insertion)) {
                    var insertion = { }; insertion[options.insertion] = responseText;
                    receiver.insert(insertion);
                }
                else options.insertion(receiver, responseText);
            }
            else receiver.update(responseText);
        }
    }
});

Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {
    initialize: function($super, container, url, options) {
        $super(options);
        this.onComplete = this.options.onComplete;

        this.frequency = (this.options.frequency || 2);
        this.decay = (this.options.decay || 1);

        this.updater = { };
        this.container = container;
        this.url = url;

        this.start();
    },

    start: function() {
        this.options.onComplete = this.updateComplete.bind(this);
        this.onTimerEvent();
    },

    stop: function() {
        this.updater.options.onComplete = undefined;
        clearTimeout(this.timer);
        (this.onComplete || Prototype.emptyFunction).apply(this, arguments);
    },

    updateComplete: function(response) {
        if (this.options.decay) {
            this.decay = (response.responseText == this.lastText ?
                this.decay * this.options.decay : 1);

            this.lastText = response.responseText;
        }
        this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);
    },

    onTimerEvent: function() {
        this.updater = new Ajax.Updater(this.container, this.url, this.options);
    }
});

(function(GLOBAL) {

    var UNDEFINED;
    var SLICE = Array.prototype.slice;

    var DIV = document.createElement('div');


    function $(element) {
        if (arguments.length > 1) {
            for (var i = 0, elements = [], length = arguments.length; i < length; i++)
                elements.push($(arguments[i]));
            return elements;
        }

        if (Object.isString(element))
            element = document.getElementById(element);
        return Element.extend(element);
    }

    GLOBAL.$ = $;


    if (!GLOBAL.Node) GLOBAL.Node = {};

    if (!GLOBAL.Node.ELEMENT_NODE) {
        Object.extend(GLOBAL.Node, {
            ELEMENT_NODE:                1,
            ATTRIBUTE_NODE:              2,
            TEXT_NODE:                   3,
            CDATA_SECTION_NODE:          4,
            ENTITY_REFERENCE_NODE:       5,
            ENTITY_NODE:                 6,
            PROCESSING_INSTRUCTION_NODE: 7,
            COMMENT_NODE:                8,
            DOCUMENT_NODE:               9,
            DOCUMENT_TYPE_NODE:         10,
            DOCUMENT_FRAGMENT_NODE:     11,
            NOTATION_NODE:              12
        });
    }

    var ELEMENT_CACHE = {};

    function shouldUseCreationCache(tagName, attributes) {
        if (tagName === 'select') return false;
        if ('type' in attributes) return false;
        return true;
    }

    var HAS_EXTENDED_CREATE_ELEMENT_SYNTAX = (function(){
        try {
            var el = document.createElement('<input name="x">');
            return el.tagName.toLowerCase() === 'input' && el.name === 'x';
        }
        catch(err) {
            return false;
        }
    })();


    var oldElement = GLOBAL.Element;
    function Element(tagName, attributes) {
        attributes = attributes || {};
        tagName = tagName.toLowerCase();

        if (HAS_EXTENDED_CREATE_ELEMENT_SYNTAX && attributes.name) {
            tagName = '<' + tagName + ' name="' + attributes.name + '">';
            delete attributes.name;
            return Element.writeAttribute(document.createElement(tagName), attributes);
        }

        if (!ELEMENT_CACHE[tagName])
            ELEMENT_CACHE[tagName] = Element.extend(document.createElement(tagName));

        var node = shouldUseCreationCache(tagName, attributes) ?
            ELEMENT_CACHE[tagName].cloneNode(false) : document.createElement(tagName);

        return Element.writeAttribute(node, attributes);
    }

    GLOBAL.Element = Element;

    Object.extend(GLOBAL.Element, oldElement || {});
    if (oldElement) GLOBAL.Element.prototype = oldElement.prototype;

    Element.Methods = { ByTag: {}, Simulated: {} };

    var methods = {};

    var INSPECT_ATTRIBUTES = { id: 'id', className: 'class' };
    function inspect(element) {
        element = $(element);
        var result = '<' + element.tagName.toLowerCase();

        var attribute, value;
        for (var property in INSPECT_ATTRIBUTES) {
            attribute = INSPECT_ATTRIBUTES[property];
            value = (element[property] || '').toString();
            if (value) result += ' ' + attribute + '=' + value.inspect(true);
        }

        return result + '>';
    }

    methods.inspect = inspect;


    function visible(element) {
        return $(element).style.display !== 'none';
    }

    function toggle(element, bool) {
        element = $(element);
        if (Object.isUndefined(bool))
            bool = !Element.visible(element);
        Element[bool ? 'show' : 'hide'](element);

        return element;
    }

    function hide(element) {
        element = $(element);
        element.style.display = 'none';
        return element;
    }

    function show(element) {
        element = $(element);
        element.style.display = '';
        return element;
    }


    Object.extend(methods, {
        visible: visible,
        toggle:  toggle,
        hide:    hide,
        show:    show
    });


    function remove(element) {
        element = $(element);
        element.parentNode.removeChild(element);
        return element;
    }

    var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){
        var el = document.createElement("select"),
            isBuggy = true;
        el.innerHTML = "<option value=\"test\">test</option>";
        if (el.options && el.options[0]) {
            isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";
        }
        el = null;
        return isBuggy;
    })();

    var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){
        try {
            var el = document.createElement("table");
            if (el && el.tBodies) {
                el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";
                var isBuggy = typeof el.tBodies[0] == "undefined";
                el = null;
                return isBuggy;
            }
        } catch (e) {
            return true;
        }
    })();

    var LINK_ELEMENT_INNERHTML_BUGGY = (function() {
        try {
            var el = document.createElement('div');
            el.innerHTML = "<link />";
            var isBuggy = (el.childNodes.length === 0);
            el = null;
            return isBuggy;
        } catch(e) {
            return true;
        }
    })();

    var ANY_INNERHTML_BUGGY = SELECT_ELEMENT_INNERHTML_BUGGY ||
        TABLE_ELEMENT_INNERHTML_BUGGY || LINK_ELEMENT_INNERHTML_BUGGY;

    var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {
        var s = document.createElement("script"),
            isBuggy = false;
        try {
            s.appendChild(document.createTextNode(""));
            isBuggy = !s.firstChild ||
                s.firstChild && s.firstChild.nodeType !== 3;
        } catch (e) {
            isBuggy = true;
        }
        s = null;
        return isBuggy;
    })();

    function update(element, content) {
        element = $(element);

        var descendants = element.getElementsByTagName('*'),
            i = descendants.length;
        while (i--) purgeElement(descendants[i]);

        if (content && content.toElement)
            content = content.toElement();

        if (Object.isElement(content))
            return element.update().insert(content);


        content = Object.toHTML(content);
        var tagName = element.tagName.toUpperCase();

        if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {
            element.text = content;
            return element;
        }

        if (ANY_INNERHTML_BUGGY) {
            if (tagName in INSERTION_TRANSLATIONS.tags) {
                while (element.firstChild)
                    element.removeChild(element.firstChild);

                var nodes = getContentFromAnonymousElement(tagName, content.stripScripts());
                for (var i = 0, node; node = nodes[i]; i++)
                    element.appendChild(node);

            } else if (LINK_ELEMENT_INNERHTML_BUGGY && Object.isString(content) && content.indexOf('<link') > -1) {
                while (element.firstChild)
                    element.removeChild(element.firstChild);

                var nodes = getContentFromAnonymousElement(tagName,
                    content.stripScripts(), true);

                for (var i = 0, node; node = nodes[i]; i++)
                    element.appendChild(node);
            } else {
                element.innerHTML = content.stripScripts();
            }
        } else {
            element.innerHTML = content.stripScripts();
        }

        content.evalScripts.bind(content).defer();
        return element;
    }

    function replace(element, content) {
        element = $(element);

        if (content && content.toElement) {
            content = content.toElement();
        } else if (!Object.isElement(content)) {
            content = Object.toHTML(content);
            var range = element.ownerDocument.createRange();
            range.selectNode(element);
            content.evalScripts.bind(content).defer();
            content = range.createContextualFragment(content.stripScripts());
        }

        element.parentNode.replaceChild(content, element);
        return element;
    }

    var INSERTION_TRANSLATIONS = {
        before: function(element, node) {
            element.parentNode.insertBefore(node, element);
        },
        top: function(element, node) {
            element.insertBefore(node, element.firstChild);
        },
        bottom: function(element, node) {
            element.appendChild(node);
        },
        after: function(element, node) {
            element.parentNode.insertBefore(node, element.nextSibling);
        },

        tags: {
            TABLE:  ['<table>',                '</table>',                   1],
            TBODY:  ['<table><tbody>',         '</tbody></table>',           2],
            TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],
            TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],
            SELECT: ['<select>',               '</select>',                  1]
        }
    };

    var tags = INSERTION_TRANSLATIONS.tags;

    Object.extend(tags, {
        THEAD: tags.TBODY,
        TFOOT: tags.TBODY,
        TH:    tags.TD
    });

    function replace_IE(element, content) {
        element = $(element);
        if (content && content.toElement)
            content = content.toElement();
        if (Object.isElement(content)) {
            element.parentNode.replaceChild(content, element);
            return element;
        }

        content = Object.toHTML(content);
        var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

        if (tagName in INSERTION_TRANSLATIONS.tags) {
            var nextSibling = Element.next(element);
            var fragments = getContentFromAnonymousElement(
                tagName, content.stripScripts());

            parent.removeChild(element);

            var iterator;
            if (nextSibling)
                iterator = function(node) { parent.insertBefore(node, nextSibling) };
            else
                iterator = function(node) { parent.appendChild(node); }

            fragments.each(iterator);
        } else {
            element.outerHTML = content.stripScripts();
        }

        content.evalScripts.bind(content).defer();
        return element;
    }

    if ('outerHTML' in document.documentElement)
        replace = replace_IE;

    function isContent(content) {
        if (Object.isUndefined(content) || content === null) return false;

        if (Object.isString(content) || Object.isNumber(content)) return true;
        if (Object.isElement(content)) return true;
        if (content.toElement || content.toHTML) return true;

        return false;
    }

    function insertContentAt(element, content, position) {
        position   = position.toLowerCase();
        var method = INSERTION_TRANSLATIONS[position];

        if (content && content.toElement) content = content.toElement();
        if (Object.isElement(content)) {
            method(element, content);
            return element;
        }

        content = Object.toHTML(content);
        var tagName = ((position === 'before' || position === 'after') ?
            element.parentNode : element).tagName.toUpperCase();

        var childNodes = getContentFromAnonymousElement(tagName, content.stripScripts());

        if (position === 'top' || position === 'after') childNodes.reverse();

        for (var i = 0, node; node = childNodes[i]; i++)
            method(element, node);

        content.evalScripts.bind(content).defer();
    }

    function insert(element, insertions) {
        element = $(element);

        if (isContent(insertions))
            insertions = { bottom: insertions };

        for (var position in insertions)
            insertContentAt(element, insertions[position], position);

        return element;
    }

    function wrap(element, wrapper, attributes) {
        element = $(element);

        if (Object.isElement(wrapper)) {
            $(wrapper).writeAttribute(attributes || {});
        } else if (Object.isString(wrapper)) {
            wrapper = new Element(wrapper, attributes);
        } else {
            wrapper = new Element('div', wrapper);
        }

        if (element.parentNode)
            element.parentNode.replaceChild(wrapper, element);

        wrapper.appendChild(element);

        return wrapper;
    }

    function cleanWhitespace(element) {
        element = $(element);
        var node = element.firstChild;

        while (node) {
            var nextNode = node.nextSibling;
            if (node.nodeType === Node.TEXT_NODE && !/\S/.test(node.nodeValue))
                element.removeChild(node);
            node = nextNode;
        }
        return element;
    }

    function empty(element) {
        return $(element).innerHTML.blank();
    }

    function getContentFromAnonymousElement(tagName, html, force) {
        var t = INSERTION_TRANSLATIONS.tags[tagName], div = DIV;

        var workaround = !!t;
        if (!workaround && force) {
            workaround = true;
            t = ['', '', 0];
        }

        if (workaround) {
            div.innerHTML = '&#160;' + t[0] + html + t[1];
            div.removeChild(div.firstChild);
            for (var i = t[2]; i--; )
                div = div.firstChild;
        } else {
            div.innerHTML = html;
        }

        return $A(div.childNodes);
    }

    function clone(element, deep) {
        if (!(element = $(element))) return;
        var clone = element.cloneNode(deep);
        if (!HAS_UNIQUE_ID_PROPERTY) {
            clone._prototypeUID = UNDEFINED;
            if (deep) {
                var descendants = Element.select(clone, '*'),
                    i = descendants.length;
                while (i--)
                    descendants[i]._prototypeUID = UNDEFINED;
            }
        }
        return Element.extend(clone);
    }

    function purgeElement(element) {
        var uid = getUniqueElementID(element);
        if (uid) {
            Element.stopObserving(element);
            if (!HAS_UNIQUE_ID_PROPERTY)
                element._prototypeUID = UNDEFINED;
            delete Element.Storage[uid];
        }
    }

    function purgeCollection(elements) {
        var i = elements.length;
        while (i--)
            purgeElement(elements[i]);
    }

    function purgeCollection_IE(elements) {
        var i = elements.length, element, uid;
        while (i--) {
            element = elements[i];
            uid = getUniqueElementID(element);
            delete Element.Storage[uid];
            delete Event.cache[uid];
        }
    }

    if (HAS_UNIQUE_ID_PROPERTY) {
        purgeCollection = purgeCollection_IE;
    }


    function purge(element) {
        if (!(element = $(element))) return;
        purgeElement(element);

        var descendants = element.getElementsByTagName('*'),
            i = descendants.length;

        while (i--) purgeElement(descendants[i]);

        return null;
    }

    Object.extend(methods, {
        remove:  remove,
        update:  update,
        replace: replace,
        insert:  insert,
        wrap:    wrap,
        cleanWhitespace: cleanWhitespace,
        empty:   empty,
        clone:   clone,
        purge:   purge
    });



    function recursivelyCollect(element, property, maximumLength) {
        element = $(element);
        maximumLength = maximumLength || -1;
        var elements = [];

        while (element = element[property]) {
            if (element.nodeType === Node.ELEMENT_NODE)
                elements.push(Element.extend(element));

            if (elements.length === maximumLength) break;
        }

        return elements;
    }


    function ancestors(element) {
        return recursivelyCollect(element, 'parentNode');
    }

    function descendants(element) {
        return Element.select(element, '*');
    }

    function firstDescendant(element) {
        element = $(element).firstChild;
        while (element && element.nodeType !== Node.ELEMENT_NODE)
            element = element.nextSibling;

        return $(element);
    }

    function immediateDescendants(element) {
        var results = [], child = $(element).firstChild;

        while (child) {
            if (child.nodeType === Node.ELEMENT_NODE)
                results.push(Element.extend(child));

            child = child.nextSibling;
        }

        return results;
    }

    function previousSiblings(element) {
        return recursivelyCollect(element, 'previousSibling');
    }

    function nextSiblings(element) {
        return recursivelyCollect(element, 'nextSibling');
    }

    function siblings(element) {
        element = $(element);
        var previous = previousSiblings(element),
            next = nextSiblings(element);
        return previous.reverse().concat(next);
    }

    function match(element, selector) {
        element = $(element);

        if (Object.isString(selector))
            return Prototype.Selector.match(element, selector);

        return selector.match(element);
    }


    function _recursivelyFind(element, property, expression, index) {
        element = $(element), expression = expression || 0, index = index || 0;
        if (Object.isNumber(expression)) {
            index = expression, expression = null;
        }

        while (element = element[property]) {
            if (element.nodeType !== 1) continue;
            if (expression && !Prototype.Selector.match(element, expression))
                continue;
            if (--index >= 0) continue;

            return Element.extend(element);
        }
    }


    function up(element, expression, index) {
        element = $(element);

        if (arguments.length === 1) return $(element.parentNode);
        return _recursivelyFind(element, 'parentNode', expression, index);
    }

    function down(element, expression, index) {
        element = $(element), expression = expression || 0, index = index || 0;

        if (Object.isNumber(expression))
            index = expression, expression = '*';

        var node = Prototype.Selector.select(expression, element)[index];
        return Element.extend(node);
    }

    function previous(element, expression, index) {
        return _recursivelyFind(element, 'previousSibling', expression, index);
    }

    function next(element, expression, index) {
        return _recursivelyFind(element, 'nextSibling', expression, index);
    }

    function select(element) {
        element = $(element);
        var expressions = SLICE.call(arguments, 1).join(', ');
        return Prototype.Selector.select(expressions, element);
    }

    function adjacent(element) {
        element = $(element);
        var expressions = SLICE.call(arguments, 1).join(', ');
        var siblings = Element.siblings(element), results = [];
        for (var i = 0, sibling; sibling = siblings[i]; i++) {
            if (Prototype.Selector.match(sibling, expressions))
                results.push(sibling);
        }

        return results;
    }

    function descendantOf_DOM(element, ancestor) {
        element = $(element), ancestor = $(ancestor);
        while (element = element.parentNode)
            if (element === ancestor) return true;
        return false;
    }

    function descendantOf_contains(element, ancestor) {
        element = $(element), ancestor = $(ancestor);
        if (!ancestor.contains) return descendantOf_DOM(element, ancestor);
        return ancestor.contains(element) && ancestor !== element;
    }

    function descendantOf_compareDocumentPosition(element, ancestor) {
        element = $(element), ancestor = $(ancestor);
        return (element.compareDocumentPosition(ancestor) & 8) === 8;
    }

    var descendantOf;
    if (DIV.compareDocumentPosition) {
        descendantOf = descendantOf_compareDocumentPosition;
    } else if (DIV.contains) {
        descendantOf = descendantOf_contains;
    } else {
        descendantOf = descendantOf_DOM;
    }


    Object.extend(methods, {
        recursivelyCollect:   recursivelyCollect,
        ancestors:            ancestors,
        descendants:          descendants,
        firstDescendant:      firstDescendant,
        immediateDescendants: immediateDescendants,
        previousSiblings:     previousSiblings,
        nextSiblings:         nextSiblings,
        siblings:             siblings,
        match:                match,
        up:                   up,
        down:                 down,
        previous:             previous,
        next:                 next,
        select:               select,
        adjacent:             adjacent,
        descendantOf:         descendantOf,

        getElementsBySelector: select,

        childElements:         immediateDescendants
    });


    var idCounter = 1;
    function identify(element) {
        element = $(element);
        var id = Element.readAttribute(element, 'id');
        if (id) return id;

        do { id = 'anonymous_element_' + idCounter++ } while ($(id));

        Element.writeAttribute(element, 'id', id);
        return id;
    }


    function readAttribute(element, name) {
        return $(element).getAttribute(name);
    }

    function readAttribute_IE(element, name) {
        element = $(element);

        var table = ATTRIBUTE_TRANSLATIONS.read;
        if (table.values[name])
            return table.values[name](element, name);

        if (table.names[name]) name = table.names[name];

        if (name.include(':')) {
            if (!element.attributes || !element.attributes[name]) return null;
            return element.attributes[name].value;
        }

        return element.getAttribute(name);
    }

    function readAttribute_Opera(element, name) {
        if (name === 'title') return element.title;
        return element.getAttribute(name);
    }

    var PROBLEMATIC_ATTRIBUTE_READING = (function() {
        DIV.setAttribute('onclick', Prototype.emptyFunction);
        var value = DIV.getAttribute('onclick');
        var isFunction = (typeof value === 'function');
        DIV.removeAttribute('onclick');
        return isFunction;
    })();

    if (PROBLEMATIC_ATTRIBUTE_READING) {
        readAttribute = readAttribute_IE;
    } else if (Prototype.Browser.Opera) {
        readAttribute = readAttribute_Opera;
    }


    function writeAttribute(element, name, value) {
        element = $(element);
        var attributes = {}, table = ATTRIBUTE_TRANSLATIONS.write;

        if (typeof name === 'object') {
            attributes = name;
        } else {
            attributes[name] = Object.isUndefined(value) ? true : value;
        }

        for (var attr in attributes) {
            name = table.names[attr] || attr;
            value = attributes[attr];
            if (table.values[attr])
                name = table.values[attr](element, value);
            if (value === false || value === null)
                element.removeAttribute(name);
            else if (value === true)
                element.setAttribute(name, name);
            else element.setAttribute(name, value);
        }

        return element;
    }

    function hasAttribute(element, attribute) {
        attribute = ATTRIBUTE_TRANSLATIONS.has[attribute] || attribute;
        var node = $(element).getAttributeNode(attribute);
        return !!(node && node.specified);
    }

    GLOBAL.Element.Methods.Simulated.hasAttribute = hasAttribute;

    function classNames(element) {
        return new Element.ClassNames(element);
    }

    var regExpCache = {};
    function getRegExpForClassName(className) {
        if (regExpCache[className]) return regExpCache[className];

        var re = new RegExp("(^|\\s+)" + className + "(\\s+|$)");
        regExpCache[className] = re;
        return re;
    }

    function hasClassName(element, className) {
        if (!(element = $(element))) return;

        var elementClassName = element.className;

        if (elementClassName.length === 0) return false;
        if (elementClassName === className) return true;

        return getRegExpForClassName(className).test(elementClassName);
    }

    function addClassName(element, className) {
        if (!(element = $(element))) return;

        if (!hasClassName(element, className))
            element.className += (element.className ? ' ' : '') + className;

        return element;
    }

    function removeClassName(element, className) {
        if (!(element = $(element))) return;

        element.className = element.className.replace(
            getRegExpForClassName(className), ' ').strip();

        return element;
    }

    function toggleClassName(element, className, bool) {
        if (!(element = $(element))) return;

        if (Object.isUndefined(bool))
            bool = !hasClassName(element, className);

        var method = Element[bool ? 'addClassName' : 'removeClassName'];
        return method(element, className);
    }

    var ATTRIBUTE_TRANSLATIONS = {};

    var classProp = 'className', forProp = 'for';

    DIV.setAttribute(classProp, 'x');
    if (DIV.className !== 'x') {
        DIV.setAttribute('class', 'x');
        if (DIV.className === 'x')
            classProp = 'class';
    }

    var LABEL = document.createElement('label');
    LABEL.setAttribute(forProp, 'x');
    if (LABEL.htmlFor !== 'x') {
        LABEL.setAttribute('htmlFor', 'x');
        if (LABEL.htmlFor === 'x')
            forProp = 'htmlFor';
    }
    LABEL = null;

    function _getAttr(element, attribute) {
        return element.getAttribute(attribute);
    }

    function _getAttr2(element, attribute) {
        return element.getAttribute(attribute, 2);
    }

    function _getAttrNode(element, attribute) {
        var node = element.getAttributeNode(attribute);
        return node ? node.value : '';
    }

    function _getFlag(element, attribute) {
        return $(element).hasAttribute(attribute) ? attribute : null;
    }

    DIV.onclick = Prototype.emptyFunction;
    var onclickValue = DIV.getAttribute('onclick');

    var _getEv;

    if (String(onclickValue).indexOf('{') > -1) {
        _getEv = function(element, attribute) {
            var value = element.getAttribute(attribute);
            if (!value) return null;
            value = value.toString();
            value = value.split('{')[1];
            value = value.split('}')[0];
            return value.strip();
        };
    }
    else if (onclickValue === '') {
        _getEv = function(element, attribute) {
            var value = element.getAttribute(attribute);
            if (!value) return null;
            return value.strip();
        };
    }

    ATTRIBUTE_TRANSLATIONS.read = {
        names: {
            'class':     classProp,
            'className': classProp,
            'for':       forProp,
            'htmlFor':   forProp
        },

        values: {
            style: function(element) {
                return element.style.cssText.toLowerCase();
            },
            title: function(element) {
                return element.title;
            }
        }
    };

    ATTRIBUTE_TRANSLATIONS.write = {
        names: {
            className:   'class',
            htmlFor:     'for',
            cellpadding: 'cellPadding',
            cellspacing: 'cellSpacing'
        },

        values: {
            checked: function(element, value) {
                element.checked = !!value;
            },

            style: function(element, value) {
                element.style.cssText = value ? value : '';
            }
        }
    };

    ATTRIBUTE_TRANSLATIONS.has = { names: {} };

    Object.extend(ATTRIBUTE_TRANSLATIONS.write.names,
        ATTRIBUTE_TRANSLATIONS.read.names);

    var CAMEL_CASED_ATTRIBUTE_NAMES = $w('colSpan rowSpan vAlign dateTime ' +
        'accessKey tabIndex encType maxLength readOnly longDesc frameBorder');

    for (var i = 0, attr; attr = CAMEL_CASED_ATTRIBUTE_NAMES[i]; i++) {
        ATTRIBUTE_TRANSLATIONS.write.names[attr.toLowerCase()] = attr;
        ATTRIBUTE_TRANSLATIONS.has.names[attr.toLowerCase()]   = attr;
    }

    Object.extend(ATTRIBUTE_TRANSLATIONS.read.values, {
        href:        _getAttr2,
        src:         _getAttr2,
        type:        _getAttr,
        action:      _getAttrNode,
        disabled:    _getFlag,
        checked:     _getFlag,
        readonly:    _getFlag,
        multiple:    _getFlag,
        onload:      _getEv,
        onunload:    _getEv,
        onclick:     _getEv,
        ondblclick:  _getEv,
        onmousedown: _getEv,
        onmouseup:   _getEv,
        onmouseover: _getEv,
        onmousemove: _getEv,
        onmouseout:  _getEv,
        onfocus:     _getEv,
        onblur:      _getEv,
        onkeypress:  _getEv,
        onkeydown:   _getEv,
        onkeyup:     _getEv,
        onsubmit:    _getEv,
        onreset:     _getEv,
        onselect:    _getEv,
        onchange:    _getEv
    });


    Object.extend(methods, {
        identify:        identify,
        readAttribute:   readAttribute,
        writeAttribute:  writeAttribute,
        classNames:      classNames,
        hasClassName:    hasClassName,
        addClassName:    addClassName,
        removeClassName: removeClassName,
        toggleClassName: toggleClassName
    });


    function normalizeStyleName(style) {
        if (style === 'float' || style === 'styleFloat')
            return 'cssFloat';
        return style.camelize();
    }

    function normalizeStyleName_IE(style) {
        if (style === 'float' || style === 'cssFloat')
            return 'styleFloat';
        return style.camelize();
    }

    function setStyle(element, styles) {
        element = $(element);
        var elementStyle = element.style, match;

        if (Object.isString(styles)) {
            elementStyle.cssText += ';' + styles;
            if (styles.include('opacity')) {
                var opacity = styles.match(/opacity:\s*(\d?\.?\d*)/)[1];
                Element.setOpacity(element, opacity);
            }
            return element;
        }

        for (var property in styles) {
            if (property === 'opacity') {
                Element.setOpacity(element, styles[property]);
            } else {
                var value = styles[property];
                if (property === 'float' || property === 'cssFloat') {
                    property = Object.isUndefined(elementStyle.styleFloat) ?
                        'cssFloat' : 'styleFloat';
                }
                elementStyle[property] = value;
            }
        }

        return element;
    }


    function getStyle(element, style) {
        element = $(element);
        style = normalizeStyleName(style);

        var value = element.style[style];
        if (!value || value === 'auto') {
            var css = document.defaultView.getComputedStyle(element, null);
            value = css ? css[style] : null;
        }

        if (style === 'opacity') return value ? parseFloat(value) : 1.0;
        return value === 'auto' ? null : value;
    }

    function getStyle_Opera(element, style) {
        switch (style) {
            case 'height': case 'width':
            if (!Element.visible(element)) return null;

            var dim = parseInt(getStyle(element, style), 10);

            if (dim !== element['offset' + style.capitalize()])
                return dim + 'px';

            return Element.measure(element, style);

            default: return getStyle(element, style);
        }
    }

    function getStyle_IE(element, style) {
        element = $(element);
        style = normalizeStyleName_IE(style);

        var value = element.style[style];
        if (!value && element.currentStyle) {
            value = element.currentStyle[style];
        }

        if (style === 'opacity' && !STANDARD_CSS_OPACITY_SUPPORTED)
            return getOpacity_IE(element);

        if (value === 'auto') {
            if ((style === 'width' || style === 'height') && Element.visible(element))
                return Element.measure(element, style) + 'px';
            return null;
        }

        return value;
    }

    function stripAlphaFromFilter_IE(filter) {
        return (filter || '').replace(/alpha\([^\)]*\)/gi, '');
    }

    function hasLayout_IE(element) {
        if (!element.currentStyle.hasLayout)
            element.style.zoom = 1;
        return element;
    }

    var STANDARD_CSS_OPACITY_SUPPORTED = (function() {
        DIV.style.cssText = "opacity:.55";
        return /^0.55/.test(DIV.style.opacity);
    })();

    function setOpacity(element, value) {
        element = $(element);
        if (value == 1 || value === '') value = '';
        else if (value < 0.00001) value = 0;
        element.style.opacity = value;
        return element;
    }

    function setOpacity_IE(element, value) {
        if (STANDARD_CSS_OPACITY_SUPPORTED)
            return setOpacity(element, value);

        element = hasLayout_IE($(element));
        var filter = Element.getStyle(element, 'filter'),
            style = element.style;

        if (value == 1 || value === '') {
            filter = stripAlphaFromFilter_IE(filter);
            if (filter) style.filter = filter;
            else style.removeAttribute('filter');
            return element;
        }

        if (value < 0.00001) value = 0;

        style.filter = stripAlphaFromFilter_IE(filter) +
            'alpha(opacity=' + (value * 100) + ')';

        return element;
    }


    function getOpacity(element) {
        return Element.getStyle(element, 'opacity');
    }

    function getOpacity_IE(element) {
        if (STANDARD_CSS_OPACITY_SUPPORTED)
            return getOpacity(element);

        var filter = Element.getStyle(element, 'filter');
        if (filter.length === 0) return 1.0;
        var match = (filter || '').match(/alpha\(opacity=(.*)\)/);
        if (match[1]) return parseFloat(match[1]) / 100;
        return 1.0;
    }


    Object.extend(methods, {
        setStyle:   setStyle,
        getStyle:   getStyle,
        setOpacity: setOpacity,
        getOpacity: getOpacity
    });

    if ('styleFloat' in DIV.style) {
        methods.getStyle = getStyle_IE;
        methods.setOpacity = setOpacity_IE;
        methods.getOpacity = getOpacity_IE;
    }

    var UID = 0;

    GLOBAL.Element.Storage = { UID: 1 };

    function getUniqueElementID(element) {
        if (element === window) return 0;

        if (typeof element._prototypeUID === 'undefined')
            element._prototypeUID = Element.Storage.UID++;
        return element._prototypeUID;
    }

    function getUniqueElementID_IE(element) {
        if (element === window) return 0;
        if (element == document) return 1;
        return element.uniqueID;
    }

    var HAS_UNIQUE_ID_PROPERTY = ('uniqueID' in DIV);
    if (HAS_UNIQUE_ID_PROPERTY)
        getUniqueElementID = getUniqueElementID_IE;

    function getStorage(element) {
        if (!(element = $(element))) return;

        var uid = getUniqueElementID(element);

        if (!Element.Storage[uid])
            Element.Storage[uid] = $H();

        return Element.Storage[uid];
    }

    function store(element, key, value) {
        if (!(element = $(element))) return;
        var storage = getStorage(element);
        if (arguments.length === 2) {
            storage.update(key);
        } else {
            storage.set(key, value);
        }
        return element;
    }

    function retrieve(element, key, defaultValue) {
        if (!(element = $(element))) return;
        var storage = getStorage(element), value = storage.get(key);

        if (Object.isUndefined(value)) {
            storage.set(key, defaultValue);
            value = defaultValue;
        }

        return value;
    }


    Object.extend(methods, {
        getStorage: getStorage,
        store:      store,
        retrieve:   retrieve
    });


    var Methods = {}, ByTag = Element.Methods.ByTag,
        F = Prototype.BrowserFeatures;

    if (!F.ElementExtensions && ('__proto__' in DIV)) {
        GLOBAL.HTMLElement = {};
        GLOBAL.HTMLElement.prototype = DIV['__proto__'];
        F.ElementExtensions = true;
    }

    function checkElementPrototypeDeficiency(tagName) {
        if (typeof window.Element === 'undefined') return false;
        var proto = window.Element.prototype;
        if (proto) {
            var id = '_' + (Math.random() + '').slice(2),
                el = document.createElement(tagName);
            proto[id] = 'x';
            var isBuggy = (el[id] !== 'x');
            delete proto[id];
            el = null;
            return isBuggy;
        }

        return false;
    }

    var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY =
        checkElementPrototypeDeficiency('object');

    function extendElementWith(element, methods) {
        for (var property in methods) {
            var value = methods[property];
            if (Object.isFunction(value) && !(property in element))
                element[property] = value.methodize();
        }
    }

    var EXTENDED = {};
    function elementIsExtended(element) {
        var uid = getUniqueElementID(element);
        return (uid in EXTENDED);
    }

    function extend(element) {
        if (!element || elementIsExtended(element)) return element;
        if (element.nodeType !== Node.ELEMENT_NODE || element == window)
            return element;

        var methods = Object.clone(Methods),
            tagName = element.tagName.toUpperCase();

        if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

        extendElementWith(element, methods);
        EXTENDED[getUniqueElementID(element)] = true;
        return element;
    }

    function extend_IE8(element) {
        if (!element || elementIsExtended(element)) return element;

        var t = element.tagName;
        if (t && (/^(?:object|applet|embed)$/i.test(t))) {
            extendElementWith(element, Element.Methods);
            extendElementWith(element, Element.Methods.Simulated);
            extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);
        }

        return element;
    }

    if (F.SpecificElementExtensions) {
        extend = HTMLOBJECTELEMENT_PROTOTYPE_BUGGY ? extend_IE8 : Prototype.K;
    }

    function addMethodsToTagName(tagName, methods) {
        tagName = tagName.toUpperCase();
        if (!ByTag[tagName]) ByTag[tagName] = {};
        Object.extend(ByTag[tagName], methods);
    }

    function mergeMethods(destination, methods, onlyIfAbsent) {
        if (Object.isUndefined(onlyIfAbsent)) onlyIfAbsent = false;
        for (var property in methods) {
            var value = methods[property];
            if (!Object.isFunction(value)) continue;
            if (!onlyIfAbsent || !(property in destination))
                destination[property] = value.methodize();
        }
    }

    function findDOMClass(tagName) {
        var klass;
        var trans = {
            "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
            "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
            "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
            "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
            "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
                "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
                "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
                "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
                "FrameSet", "IFRAME": "IFrame"
        };
        if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
        if (window[klass]) return window[klass];
        klass = 'HTML' + tagName + 'Element';
        if (window[klass]) return window[klass];
        klass = 'HTML' + tagName.capitalize() + 'Element';
        if (window[klass]) return window[klass];

        var element = document.createElement(tagName),
            proto = element['__proto__'] || element.constructor.prototype;

        element = null;
        return proto;
    }

    function addMethods(methods) {
        if (arguments.length === 0) addFormMethods();

        if (arguments.length === 2) {
            var tagName = methods;
            methods = arguments[1];
        }

        if (!tagName) {
            Object.extend(Element.Methods, methods || {});
        } else {
            if (Object.isArray(tagName)) {
                for (var i = 0, tag; tag = tagName[i]; i++)
                    addMethodsToTagName(tag, methods);
            } else {
                addMethodsToTagName(tagName, methods);
            }
        }

        var ELEMENT_PROTOTYPE = window.HTMLElement ? HTMLElement.prototype :
            Element.prototype;

        if (F.ElementExtensions) {
            mergeMethods(ELEMENT_PROTOTYPE, Element.Methods);
            mergeMethods(ELEMENT_PROTOTYPE, Element.Methods.Simulated, true);
        }

        if (F.SpecificElementExtensions) {
            for (var tag in Element.Methods.ByTag) {
                var klass = findDOMClass(tag);
                if (Object.isUndefined(klass)) continue;
                mergeMethods(klass.prototype, ByTag[tag]);
            }
        }

        Object.extend(Element, Element.Methods);
        Object.extend(Element, Element.Methods.Simulated);
        delete Element.ByTag;
        delete Element.Simulated;

        Element.extend.refresh();

        ELEMENT_CACHE = {};
    }

    Object.extend(GLOBAL.Element, {
        extend:     extend,
        addMethods: addMethods
    });

    if (extend === Prototype.K) {
        GLOBAL.Element.extend.refresh = Prototype.emptyFunction;
    } else {
        GLOBAL.Element.extend.refresh = function() {
            if (Prototype.BrowserFeatures.ElementExtensions) return;
            Object.extend(Methods, Element.Methods);
            Object.extend(Methods, Element.Methods.Simulated);

            EXTENDED = {};
        };
    }

    function addFormMethods() {
        Object.extend(Form, Form.Methods);
        Object.extend(Form.Element, Form.Element.Methods);
        Object.extend(Element.Methods.ByTag, {
            "FORM":     Object.clone(Form.Methods),
            "INPUT":    Object.clone(Form.Element.Methods),
            "SELECT":   Object.clone(Form.Element.Methods),
            "TEXTAREA": Object.clone(Form.Element.Methods),
            "BUTTON":   Object.clone(Form.Element.Methods)
        });
    }

    Element.addMethods(methods);

})(this);
(function() {

    function toDecimal(pctString) {
        var match = pctString.match(/^(\d+)%?$/i);
        if (!match) return null;
        return (Number(match[1]) / 100);
    }

    function getRawStyle(element, style) {
        element = $(element);

        var value = element.style[style];
        if (!value || value === 'auto') {
            var css = document.defaultView.getComputedStyle(element, null);
            value = css ? css[style] : null;
        }

        if (style === 'opacity') return value ? parseFloat(value) : 1.0;
        return value === 'auto' ? null : value;
    }

    function getRawStyle_IE(element, style) {
        var value = element.style[style];
        if (!value && element.currentStyle) {
            value = element.currentStyle[style];
        }
        return value;
    }

    function getContentWidth(element, context) {
        var boxWidth = element.offsetWidth;

        var bl = getPixelValue(element, 'borderLeftWidth',  context) || 0;
        var br = getPixelValue(element, 'borderRightWidth', context) || 0;
        var pl = getPixelValue(element, 'paddingLeft',      context) || 0;
        var pr = getPixelValue(element, 'paddingRight',     context) || 0;

        return boxWidth - bl - br - pl - pr;
    }

    if ('currentStyle' in document.documentElement) {
        getRawStyle = getRawStyle_IE;
    }


    function getPixelValue(value, property, context) {
        var element = null;
        if (Object.isElement(value)) {
            element = value;
            value = getRawStyle(element, property);
        }

        if (value === null || Object.isUndefined(value)) {
            return null;
        }

        if ((/^(?:-)?\d+(\.\d+)?(px)?$/i).test(value)) {
            return window.parseFloat(value);
        }

        var isPercentage = value.include('%'), isViewport = (context === document.viewport);

        if (/\d/.test(value) && element && element.runtimeStyle && !(isPercentage && isViewport)) {
            var style = element.style.left, rStyle = element.runtimeStyle.left;
            element.runtimeStyle.left = element.currentStyle.left;
            element.style.left = value || 0;
            value = element.style.pixelLeft;
            element.style.left = style;
            element.runtimeStyle.left = rStyle;

            return value;
        }

        if (element && isPercentage) {
            context = context || element.parentNode;
            var decimal = toDecimal(value), whole = null;

            var isHorizontal = property.include('left') || property.include('right') ||
                property.include('width');

            var isVertical   = property.include('top') || property.include('bottom') ||
                property.include('height');

            if (context === document.viewport) {
                if (isHorizontal) {
                    whole = document.viewport.getWidth();
                } else if (isVertical) {
                    whole = document.viewport.getHeight();
                }
            } else {
                if (isHorizontal) {
                    whole = $(context).measure('width');
                } else if (isVertical) {
                    whole = $(context).measure('height');
                }
            }

            return (whole === null) ? 0 : whole * decimal;
        }

        return 0;
    }

    function toCSSPixels(number) {
        if (Object.isString(number) && number.endsWith('px'))
            return number;
        return number + 'px';
    }

    function isDisplayed(element) {
        while (element && element.parentNode) {
            var display = element.getStyle('display');
            if (display === 'none') {
                return false;
            }
            element = $(element.parentNode);
        }
        return true;
    }

    var hasLayout = Prototype.K;
    if ('currentStyle' in document.documentElement) {
        hasLayout = function(element) {
            if (!element.currentStyle.hasLayout) {
                element.style.zoom = 1;
            }
            return element;
        };
    }

    function cssNameFor(key) {
        if (key.include('border')) key = key + '-width';
        return key.camelize();
    }

    Element.Layout = Class.create(Hash, {
        initialize: function($super, element, preCompute) {
            $super();
            this.element = $(element);

            Element.Layout.PROPERTIES.each( function(property) {
                this._set(property, null);
            }, this);

            if (preCompute) {
                this._preComputing = true;
                this._begin();
                Element.Layout.PROPERTIES.each( this._compute, this );
                this._end();
                this._preComputing = false;
            }
        },

        _set: function(property, value) {
            return Hash.prototype.set.call(this, property, value);
        },

        set: function(property, value) {
            throw "Properties of Element.Layout are read-only.";
        },

        get: function($super, property) {
            var value = $super(property);
            return value === null ? this._compute(property) : value;
        },

        _begin: function() {
            if (this._isPrepared()) return;

            var element = this.element;
            if (isDisplayed(element)) {
                this._setPrepared(true);
                return;
            }


            var originalStyles = {
                position:   element.style.position   || '',
                width:      element.style.width      || '',
                visibility: element.style.visibility || '',
                display:    element.style.display    || ''
            };

            element.store('prototype_original_styles', originalStyles);

            var position = getRawStyle(element, 'position'), width = element.offsetWidth;

            if (width === 0 || width === null) {
                element.style.display = 'block';
                width = element.offsetWidth;
            }

            var context = (position === 'fixed') ? document.viewport :
                element.parentNode;

            var tempStyles = {
                visibility: 'hidden',
                display:    'block'
            };

            if (position !== 'fixed') tempStyles.position = 'absolute';

            element.setStyle(tempStyles);

            var positionedWidth = element.offsetWidth, newWidth;
            if (width && (positionedWidth === width)) {
                newWidth = getContentWidth(element, context);
            } else if (position === 'absolute' || position === 'fixed') {
                newWidth = getContentWidth(element, context);
            } else {
                var parent = element.parentNode, pLayout = $(parent).getLayout();

                newWidth = pLayout.get('width') -
                    this.get('margin-left') -
                    this.get('border-left') -
                    this.get('padding-left') -
                    this.get('padding-right') -
                    this.get('border-right') -
                    this.get('margin-right');
            }

            element.setStyle({ width: newWidth + 'px' });

            this._setPrepared(true);
        },

        _end: function() {
            var element = this.element;
            var originalStyles = element.retrieve('prototype_original_styles');
            element.store('prototype_original_styles', null);
            element.setStyle(originalStyles);
            this._setPrepared(false);
        },

        _compute: function(property) {
            var COMPUTATIONS = Element.Layout.COMPUTATIONS;
            if (!(property in COMPUTATIONS)) {
                throw "Property not found.";
            }

            return this._set(property, COMPUTATIONS[property].call(this, this.element));
        },

        _isPrepared: function() {
            return this.element.retrieve('prototype_element_layout_prepared', false);
        },

        _setPrepared: function(bool) {
            return this.element.store('prototype_element_layout_prepared', bool);
        },

        toObject: function() {
            var args = $A(arguments);
            var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
                args.join(' ').split(' ');
            var obj = {};
            keys.each( function(key) {
                if (!Element.Layout.PROPERTIES.include(key)) return;
                var value = this.get(key);
                if (value != null) obj[key] = value;
            }, this);
            return obj;
        },

        toHash: function() {
            var obj = this.toObject.apply(this, arguments);
            return new Hash(obj);
        },

        toCSS: function() {
            var args = $A(arguments);
            var keys = (args.length === 0) ? Element.Layout.PROPERTIES :
                args.join(' ').split(' ');
            var css = {};

            keys.each( function(key) {
                if (!Element.Layout.PROPERTIES.include(key)) return;
                if (Element.Layout.COMPOSITE_PROPERTIES.include(key)) return;

                var value = this.get(key);
                if (value != null) css[cssNameFor(key)] = value + 'px';
            }, this);
            return css;
        },

        inspect: function() {
            return "#<Element.Layout>";
        }
    });

    Object.extend(Element.Layout, {
        PROPERTIES: $w('height width top left right bottom border-left border-right border-top border-bottom padding-left padding-right padding-top padding-bottom margin-top margin-bottom margin-left margin-right padding-box-width padding-box-height border-box-width border-box-height margin-box-width margin-box-height'),

        COMPOSITE_PROPERTIES: $w('padding-box-width padding-box-height margin-box-width margin-box-height border-box-width border-box-height'),

        COMPUTATIONS: {
            'height': function(element) {
                if (!this._preComputing) this._begin();

                var bHeight = this.get('border-box-height');
                if (bHeight <= 0) {
                    if (!this._preComputing) this._end();
                    return 0;
                }

                var bTop = this.get('border-top'),
                    bBottom = this.get('border-bottom');

                var pTop = this.get('padding-top'),
                    pBottom = this.get('padding-bottom');

                if (!this._preComputing) this._end();

                return bHeight - bTop - bBottom - pTop - pBottom;
            },

            'width': function(element) {
                if (!this._preComputing) this._begin();

                var bWidth = this.get('border-box-width');
                if (bWidth <= 0) {
                    if (!this._preComputing) this._end();
                    return 0;
                }

                var bLeft = this.get('border-left'),
                    bRight = this.get('border-right');

                var pLeft = this.get('padding-left'),
                    pRight = this.get('padding-right');

                if (!this._preComputing) this._end();
                return bWidth - bLeft - bRight - pLeft - pRight;
            },

            'padding-box-height': function(element) {
                var height = this.get('height'),
                    pTop = this.get('padding-top'),
                    pBottom = this.get('padding-bottom');

                return height + pTop + pBottom;
            },

            'padding-box-width': function(element) {
                var width = this.get('width'),
                    pLeft = this.get('padding-left'),
                    pRight = this.get('padding-right');

                return width + pLeft + pRight;
            },

            'border-box-height': function(element) {
                if (!this._preComputing) this._begin();
                var height = element.offsetHeight;
                if (!this._preComputing) this._end();
                return height;
            },

            'border-box-width': function(element) {
                if (!this._preComputing) this._begin();
                var width = element.offsetWidth;
                if (!this._preComputing) this._end();
                return width;
            },

            'margin-box-height': function(element) {
                var bHeight = this.get('border-box-height'),
                    mTop = this.get('margin-top'),
                    mBottom = this.get('margin-bottom');

                if (bHeight <= 0) return 0;

                return bHeight + mTop + mBottom;
            },

            'margin-box-width': function(element) {
                var bWidth = this.get('border-box-width'),
                    mLeft = this.get('margin-left'),
                    mRight = this.get('margin-right');

                if (bWidth <= 0) return 0;

                return bWidth + mLeft + mRight;
            },

            'top': function(element) {
                var offset = element.positionedOffset();
                return offset.top;
            },

            'bottom': function(element) {
                var offset = element.positionedOffset(),
                    parent = element.getOffsetParent(),
                    pHeight = parent.measure('height');

                var mHeight = this.get('border-box-height');

                return pHeight - mHeight - offset.top;
            },

            'left': function(element) {
                var offset = element.positionedOffset();
                return offset.left;
            },

            'right': function(element) {
                var offset = element.positionedOffset(),
                    parent = element.getOffsetParent(),
                    pWidth = parent.measure('width');

                var mWidth = this.get('border-box-width');

                return pWidth - mWidth - offset.left;
            },

            'padding-top': function(element) {
                return getPixelValue(element, 'paddingTop');
            },

            'padding-bottom': function(element) {
                return getPixelValue(element, 'paddingBottom');
            },

            'padding-left': function(element) {
                return getPixelValue(element, 'paddingLeft');
            },

            'padding-right': function(element) {
                return getPixelValue(element, 'paddingRight');
            },

            'border-top': function(element) {
                return getPixelValue(element, 'borderTopWidth');
            },

            'border-bottom': function(element) {
                return getPixelValue(element, 'borderBottomWidth');
            },

            'border-left': function(element) {
                return getPixelValue(element, 'borderLeftWidth');
            },

            'border-right': function(element) {
                return getPixelValue(element, 'borderRightWidth');
            },

            'margin-top': function(element) {
                return getPixelValue(element, 'marginTop');
            },

            'margin-bottom': function(element) {
                return getPixelValue(element, 'marginBottom');
            },

            'margin-left': function(element) {
                return getPixelValue(element, 'marginLeft');
            },

            'margin-right': function(element) {
                return getPixelValue(element, 'marginRight');
            }
        }
    });

    if ('getBoundingClientRect' in document.documentElement) {
        Object.extend(Element.Layout.COMPUTATIONS, {
            'right': function(element) {
                var parent = hasLayout(element.getOffsetParent());
                var rect = element.getBoundingClientRect(),
                    pRect = parent.getBoundingClientRect();

                return (pRect.right - rect.right).round();
            },

            'bottom': function(element) {
                var parent = hasLayout(element.getOffsetParent());
                var rect = element.getBoundingClientRect(),
                    pRect = parent.getBoundingClientRect();

                return (pRect.bottom - rect.bottom).round();
            }
        });
    }

    Element.Offset = Class.create({
        initialize: function(left, top) {
            this.left = left.round();
            this.top  = top.round();

            this[0] = this.left;
            this[1] = this.top;
        },

        relativeTo: function(offset) {
            return new Element.Offset(
                this.left - offset.left,
                this.top  - offset.top
            );
        },

        inspect: function() {
            return "#<Element.Offset left: #{left} top: #{top}>".interpolate(this);
        },

        toString: function() {
            return "[#{left}, #{top}]".interpolate(this);
        },

        toArray: function() {
            return [this.left, this.top];
        }
    });

    function getLayout(element, preCompute) {
        return new Element.Layout(element, preCompute);
    }

    function measure(element, property) {
        return $(element).getLayout().get(property);
    }

    function getHeight(element) {
        return Element.getDimensions(element).height;
    }

    function getWidth(element) {
        return Element.getDimensions(element).width;
    }

    function getDimensions(element) {
        element = $(element);
        var display = Element.getStyle(element, 'display');

        if (display && display !== 'none') {
            return { width: element.offsetWidth, height: element.offsetHeight };
        }

        var style = element.style;
        var originalStyles = {
            visibility: style.visibility,
            position:   style.position,
            display:    style.display
        };

        var newStyles = {
            visibility: 'hidden',
            display:    'block'
        };

        if (originalStyles.position !== 'fixed')
            newStyles.position = 'absolute';

        Element.setStyle(element, newStyles);

        var dimensions = {
            width:  element.offsetWidth,
            height: element.offsetHeight
        };

        Element.setStyle(element, originalStyles);

        return dimensions;
    }

    function getOffsetParent(element) {
        element = $(element);

        if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
            return $(document.body);

        var isInline = (Element.getStyle(element, 'display') === 'inline');
        if (!isInline && element.offsetParent) return $(element.offsetParent);

        while ((element = element.parentNode) && element !== document.body) {
            if (Element.getStyle(element, 'position') !== 'static') {
                return isHtml(element) ? $(document.body) : $(element);
            }
        }

        return $(document.body);
    }


    function cumulativeOffset(element) {
        element = $(element);
        var valueT = 0, valueL = 0;
        if (element.parentNode) {
            do {
                valueT += element.offsetTop  || 0;
                valueL += element.offsetLeft || 0;
                element = element.offsetParent;
            } while (element);
        }
        return new Element.Offset(valueL, valueT);
    }

    function positionedOffset(element) {
        element = $(element);

        var layout = element.getLayout();

        var valueT = 0, valueL = 0;
        do {
            valueT += element.offsetTop  || 0;
            valueL += element.offsetLeft || 0;
            element = element.offsetParent;
            if (element) {
                if (isBody(element)) break;
                var p = Element.getStyle(element, 'position');
                if (p !== 'static') break;
            }
        } while (element);

        valueL -= layout.get('margin-top');
        valueT -= layout.get('margin-left');

        return new Element.Offset(valueL, valueT);
    }

    function cumulativeScrollOffset(element) {
        var valueT = 0, valueL = 0;
        do {
            valueT += element.scrollTop  || 0;
            valueL += element.scrollLeft || 0;
            element = element.parentNode;
        } while (element);
        return new Element.Offset(valueL, valueT);
    }

    function viewportOffset(forElement) {
        var valueT = 0, valueL = 0, docBody = document.body;

        var element = $(forElement);
        do {
            valueT += element.offsetTop  || 0;
            valueL += element.offsetLeft || 0;
            if (element.offsetParent == docBody &&
                Element.getStyle(element, 'position') == 'absolute') break;
        } while (element = element.offsetParent);

        element = forElement;
        do {
            if (element != docBody) {
                valueT -= element.scrollTop  || 0;
                valueL -= element.scrollLeft || 0;
            }
        } while (element = element.parentNode);
        return new Element.Offset(valueL, valueT);
    }

    function absolutize(element) {
        element = $(element);

        if (Element.getStyle(element, 'position') === 'absolute') {
            return element;
        }

        var offsetParent = getOffsetParent(element);
        var eOffset = element.viewportOffset(),
            pOffset = offsetParent.viewportOffset();

        var offset = eOffset.relativeTo(pOffset);
        var layout = element.getLayout();

        element.store('prototype_absolutize_original_styles', {
            left:   element.getStyle('left'),
            top:    element.getStyle('top'),
            width:  element.getStyle('width'),
            height: element.getStyle('height')
        });

        element.setStyle({
            position: 'absolute',
            top:    offset.top + 'px',
            left:   offset.left + 'px',
            width:  layout.get('width') + 'px',
            height: layout.get('height') + 'px'
        });

        return element;
    }

    function relativize(element) {
        element = $(element);
        if (Element.getStyle(element, 'position') === 'relative') {
            return element;
        }

        var originalStyles =
            element.retrieve('prototype_absolutize_original_styles');

        if (originalStyles) element.setStyle(originalStyles);
        return element;
    }


    function scrollTo(element) {
        element = $(element);
        var pos = Element.cumulativeOffset(element);
        window.scrollTo(pos.left, pos.top);
        return element;
    }


    function makePositioned(element) {
        element = $(element);
        var position = Element.getStyle(element, 'position'), styles = {};
        if (position === 'static' || !position) {
            styles.position = 'relative';
            if (Prototype.Browser.Opera) {
                styles.top  = 0;
                styles.left = 0;
            }
            Element.setStyle(element, styles);
            Element.store(element, 'prototype_made_positioned', true);
        }
        return element;
    }

    function undoPositioned(element) {
        element = $(element);
        var storage = Element.getStorage(element),
            madePositioned = storage.get('prototype_made_positioned');

        if (madePositioned) {
            storage.unset('prototype_made_positioned');
            Element.setStyle(element, {
                position: '',
                top:      '',
                bottom:   '',
                left:     '',
                right:    ''
            });
        }
        return element;
    }

    function makeClipping(element) {
        element = $(element);

        var storage = Element.getStorage(element),
            madeClipping = storage.get('prototype_made_clipping');

        if (Object.isUndefined(madeClipping)) {
            var overflow = Element.getStyle(element, 'overflow');
            storage.set('prototype_made_clipping', overflow);
            if (overflow !== 'hidden')
                element.style.overflow = 'hidden';
        }

        return element;
    }

    function undoClipping(element) {
        element = $(element);
        var storage = Element.getStorage(element),
            overflow = storage.get('prototype_made_clipping');

        if (!Object.isUndefined(overflow)) {
            storage.unset('prototype_made_clipping');
            element.style.overflow = overflow || '';
        }

        return element;
    }

    function clonePosition(element, source, options) {
        options = Object.extend({
            setLeft:    true,
            setTop:     true,
            setWidth:   true,
            setHeight:  true,
            offsetTop:  0,
            offsetLeft: 0
        }, options || {});

        source  = $(source);
        element = $(element);
        var p, delta, layout, styles = {};

        if (options.setLeft || options.setTop) {
            p = Element.viewportOffset(source);
            delta = [0, 0];
            if (Element.getStyle(element, 'position') === 'absolute') {
                var parent = Element.getOffsetParent(element);
                if (parent !== document.body) delta = Element.viewportOffset(parent);
            }
        }

        if (options.setWidth || options.setHeight) {
            layout = Element.getLayout(source);
        }

        if (options.setLeft)
            styles.left = (p[0] - delta[0] + options.offsetLeft) + 'px';
        if (options.setTop)
            styles.top  = (p[1] - delta[1] + options.offsetTop)  + 'px';

        if (options.setWidth)
            styles.width  = layout.get('border-box-width')  + 'px';
        if (options.setHeight)
            styles.height = layout.get('border-box-height') + 'px';

        return Element.setStyle(element, styles);
    }


    if (Prototype.Browser.IE) {
        getOffsetParent = getOffsetParent.wrap(
            function(proceed, element) {
                element = $(element);

                if (isDocument(element) || isDetached(element) || isBody(element) || isHtml(element))
                    return $(document.body);

                var position = element.getStyle('position');
                if (position !== 'static') return proceed(element);

                element.setStyle({ position: 'relative' });
                var value = proceed(element);
                element.setStyle({ position: position });
                return value;
            }
        );

        positionedOffset = positionedOffset.wrap(function(proceed, element) {
            element = $(element);
            if (!element.parentNode) return new Element.Offset(0, 0);
            var position = element.getStyle('position');
            if (position !== 'static') return proceed(element);

            var offsetParent = element.getOffsetParent();
            if (offsetParent && offsetParent.getStyle('position') === 'fixed')
                hasLayout(offsetParent);

            element.setStyle({ position: 'relative' });
            var value = proceed(element);
            element.setStyle({ position: position });
            return value;
        });
    } else if (Prototype.Browser.Webkit) {
        cumulativeOffset = function(element) {
            element = $(element);
            var valueT = 0, valueL = 0;
            do {
                valueT += element.offsetTop  || 0;
                valueL += element.offsetLeft || 0;
                if (element.offsetParent == document.body) {
                    if (Element.getStyle(element, 'position') == 'absolute') break;
                }

                element = element.offsetParent;
            } while (element);

            return new Element.Offset(valueL, valueT);
        };
    }


    Element.addMethods({
        getLayout:              getLayout,
        measure:                measure,
        getWidth:               getWidth,
        getHeight:              getHeight,
        getDimensions:          getDimensions,
        getOffsetParent:        getOffsetParent,
        cumulativeOffset:       cumulativeOffset,
        positionedOffset:       positionedOffset,
        cumulativeScrollOffset: cumulativeScrollOffset,
        viewportOffset:         viewportOffset,
        absolutize:             absolutize,
        relativize:             relativize,
        scrollTo:               scrollTo,
        makePositioned:         makePositioned,
        undoPositioned:         undoPositioned,
        makeClipping:           makeClipping,
        undoClipping:           undoClipping,
        clonePosition:          clonePosition
    });

    function isBody(element) {
        return element.nodeName.toUpperCase() === 'BODY';
    }

    function isHtml(element) {
        return element.nodeName.toUpperCase() === 'HTML';
    }

    function isDocument(element) {
        return element.nodeType === Node.DOCUMENT_NODE;
    }

    function isDetached(element) {
        return element !== document.body &&
            !Element.descendantOf(element, document.body);
    }

    if ('getBoundingClientRect' in document.documentElement) {
        Element.addMethods({
            viewportOffset: function(element) {
                element = $(element);
                if (isDetached(element)) return new Element.Offset(0, 0);

                var rect = element.getBoundingClientRect(),
                    docEl = document.documentElement;
                return new Element.Offset(rect.left - docEl.clientLeft,
                    rect.top - docEl.clientTop);
            }
        });
    }


})();

(function() {

    var IS_OLD_OPERA = Prototype.Browser.Opera &&
        (window.parseFloat(window.opera.version()) < 9.5);
    var ROOT = null;
    function getRootElement() {
        if (ROOT) return ROOT;
        ROOT = IS_OLD_OPERA ? document.body : document.documentElement;
        return ROOT;
    }

    function getDimensions() {
        return { width: this.getWidth(), height: this.getHeight() };
    }

    function getWidth() {
        return getRootElement().clientWidth;
    }

    function getHeight() {
        return getRootElement().clientHeight;
    }

    function getScrollOffsets() {
        var x = window.pageXOffset || document.documentElement.scrollLeft ||
            document.body.scrollLeft;
        var y = window.pageYOffset || document.documentElement.scrollTop ||
            document.body.scrollTop;

        return new Element.Offset(x, y);
    }

    document.viewport = {
        getDimensions:    getDimensions,
        getWidth:         getWidth,
        getHeight:        getHeight,
        getScrollOffsets: getScrollOffsets
    };

})();
window.$$ = function() {
    var expression = $A(arguments).join(', ');
    return Prototype.Selector.select(expression, document);
};

Prototype.Selector = (function() {

    function select() {
        throw new Error('Method "Prototype.Selector.select" must be defined.');
    }

    function match() {
        throw new Error('Method "Prototype.Selector.match" must be defined.');
    }

    function find(elements, expression, index) {
        index = index || 0;
        var match = Prototype.Selector.match, length = elements.length, matchIndex = 0, i;

        for (i = 0; i < length; i++) {
            if (match(elements[i], expression) && index == matchIndex++) {
                return Element.extend(elements[i]);
            }
        }
    }

    function extendElements(elements) {
        for (var i = 0, length = elements.length; i < length; i++) {
            Element.extend(elements[i]);
        }
        return elements;
    }


    var K = Prototype.K;

    return {
        select: select,
        match: match,
        find: find,
        extendElements: (Element.extend === K) ? K : extendElements,
        extendElement: Element.extend
    };
})();
/*!
 * Sizzle CSS Selector Engine
 *  Copyright 2011, The Dojo Foundation
 *  Released under the MIT, BSD, and GPL Licenses.
 *  More information: http://sizzlejs.com/
 */
(function(){

    var chunker = /((?:\((?:\([^()]+\)|[^()]+)+\)|\[(?:\[[^\[\]]*\]|['"][^'"]*['"]|[^\[\]'"]+)+\]|\\.|[^ >+~,(\[\\]+)+|[>+~])(\s*,\s*)?((?:.|\r|\n)*)/g,
        done = 0,
        toString = Object.prototype.toString,
        hasDuplicate = false,
        baseHasDuplicate = true,
        rBackslash = /\\/g,
        rNonWord = /\W/;

    [0, 0].sort(function() {
        baseHasDuplicate = false;
        return 0;
    });

    var Sizzle = function( selector, context, results, seed ) {
        results = results || [];
        context = context || document;

        var origContext = context;

        if ( context.nodeType !== 1 && context.nodeType !== 9 ) {
            return [];
        }

        if ( !selector || typeof selector !== "string" ) {
            return results;
        }

        var m, set, checkSet, extra, ret, cur, pop, i,
            prune = true,
            contextXML = Sizzle.isXML( context ),
            parts = [],
            soFar = selector;

        do {
            chunker.exec( "" );
            m = chunker.exec( soFar );

            if ( m ) {
                soFar = m[3];

                parts.push( m[1] );

                if ( m[2] ) {
                    extra = m[3];
                    break;
                }
            }
        } while ( m );

        if ( parts.length > 1 && origPOS.exec( selector ) ) {

            if ( parts.length === 2 && Expr.relative[ parts[0] ] ) {
                set = posProcess( parts[0] + parts[1], context );

            } else {
                set = Expr.relative[ parts[0] ] ?
                    [ context ] :
                    Sizzle( parts.shift(), context );

                while ( parts.length ) {
                    selector = parts.shift();

                    if ( Expr.relative[ selector ] ) {
                        selector += parts.shift();
                    }

                    set = posProcess( selector, set );
                }
            }

        } else {
            if ( !seed && parts.length > 1 && context.nodeType === 9 && !contextXML &&
                Expr.match.ID.test(parts[0]) && !Expr.match.ID.test(parts[parts.length - 1]) ) {

                ret = Sizzle.find( parts.shift(), context, contextXML );
                context = ret.expr ?
                    Sizzle.filter( ret.expr, ret.set )[0] :
                    ret.set[0];
            }

            if ( context ) {
                ret = seed ?
                { expr: parts.pop(), set: makeArray(seed) } :
                    Sizzle.find( parts.pop(), parts.length === 1 && (parts[0] === "~" || parts[0] === "+") && context.parentNode ? context.parentNode : context, contextXML );

                set = ret.expr ?
                    Sizzle.filter( ret.expr, ret.set ) :
                    ret.set;

                if ( parts.length > 0 ) {
                    checkSet = makeArray( set );

                } else {
                    prune = false;
                }

                while ( parts.length ) {
                    cur = parts.pop();
                    pop = cur;

                    if ( !Expr.relative[ cur ] ) {
                        cur = "";
                    } else {
                        pop = parts.pop();
                    }

                    if ( pop == null ) {
                        pop = context;
                    }

                    Expr.relative[ cur ]( checkSet, pop, contextXML );
                }

            } else {
                checkSet = parts = [];
            }
        }

        if ( !checkSet ) {
            checkSet = set;
        }

        if ( !checkSet ) {
            Sizzle.error( cur || selector );
        }

        if ( toString.call(checkSet) === "[object Array]" ) {
            if ( !prune ) {
                results.push.apply( results, checkSet );

            } else if ( context && context.nodeType === 1 ) {
                for ( i = 0; checkSet[i] != null; i++ ) {
                    if ( checkSet[i] && (checkSet[i] === true || checkSet[i].nodeType === 1 && Sizzle.contains(context, checkSet[i])) ) {
                        results.push( set[i] );
                    }
                }

            } else {
                for ( i = 0; checkSet[i] != null; i++ ) {
                    if ( checkSet[i] && checkSet[i].nodeType === 1 ) {
                        results.push( set[i] );
                    }
                }
            }

        } else {
            makeArray( checkSet, results );
        }

        if ( extra ) {
            Sizzle( extra, origContext, results, seed );
            Sizzle.uniqueSort( results );
        }

        return results;
    };

    Sizzle.uniqueSort = function( results ) {
        if ( sortOrder ) {
            hasDuplicate = baseHasDuplicate;
            results.sort( sortOrder );

            if ( hasDuplicate ) {
                for ( var i = 1; i < results.length; i++ ) {
                    if ( results[i] === results[ i - 1 ] ) {
                        results.splice( i--, 1 );
                    }
                }
            }
        }

        return results;
    };

    Sizzle.matches = function( expr, set ) {
        return Sizzle( expr, null, null, set );
    };

    Sizzle.matchesSelector = function( node, expr ) {
        return Sizzle( expr, null, null, [node] ).length > 0;
    };

    Sizzle.find = function( expr, context, isXML ) {
        var set;

        if ( !expr ) {
            return [];
        }

        for ( var i = 0, l = Expr.order.length; i < l; i++ ) {
            var match,
                type = Expr.order[i];

            if ( (match = Expr.leftMatch[ type ].exec( expr )) ) {
                var left = match[1];
                match.splice( 1, 1 );

                if ( left.substr( left.length - 1 ) !== "\\" ) {
                    match[1] = (match[1] || "").replace( rBackslash, "" );
                    set = Expr.find[ type ]( match, context, isXML );

                    if ( set != null ) {
                        expr = expr.replace( Expr.match[ type ], "" );
                        break;
                    }
                }
            }
        }

        if ( !set ) {
            set = typeof context.getElementsByTagName !== "undefined" ?
                context.getElementsByTagName( "*" ) :
                [];
        }

        return { set: set, expr: expr };
    };

    Sizzle.filter = function( expr, set, inplace, not ) {
        var match, anyFound,
            old = expr,
            result = [],
            curLoop = set,
            isXMLFilter = set && set[0] && Sizzle.isXML( set[0] );

        while ( expr && set.length ) {
            for ( var type in Expr.filter ) {
                if ( (match = Expr.leftMatch[ type ].exec( expr )) != null && match[2] ) {
                    var found, item,
                        filter = Expr.filter[ type ],
                        left = match[1];

                    anyFound = false;

                    match.splice(1,1);

                    if ( left.substr( left.length - 1 ) === "\\" ) {
                        continue;
                    }

                    if ( curLoop === result ) {
                        result = [];
                    }

                    if ( Expr.preFilter[ type ] ) {
                        match = Expr.preFilter[ type ]( match, curLoop, inplace, result, not, isXMLFilter );

                        if ( !match ) {
                            anyFound = found = true;

                        } else if ( match === true ) {
                            continue;
                        }
                    }

                    if ( match ) {
                        for ( var i = 0; (item = curLoop[i]) != null; i++ ) {
                            if ( item ) {
                                found = filter( item, match, i, curLoop );
                                var pass = not ^ !!found;

                                if ( inplace && found != null ) {
                                    if ( pass ) {
                                        anyFound = true;

                                    } else {
                                        curLoop[i] = false;
                                    }

                                } else if ( pass ) {
                                    result.push( item );
                                    anyFound = true;
                                }
                            }
                        }
                    }

                    if ( found !== undefined ) {
                        if ( !inplace ) {
                            curLoop = result;
                        }

                        expr = expr.replace( Expr.match[ type ], "" );

                        if ( !anyFound ) {
                            return [];
                        }

                        break;
                    }
                }
            }

            if ( expr === old ) {
                if ( anyFound == null ) {
                    Sizzle.error( expr );

                } else {
                    break;
                }
            }

            old = expr;
        }

        return curLoop;
    };

    Sizzle.error = function( msg ) {
        throw "Syntax error, unrecognized expression: " + msg;
    };

    var Expr = Sizzle.selectors = {
        order: [ "ID", "NAME", "TAG" ],

        match: {
            ID: /#((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
            CLASS: /\.((?:[\w\u00c0-\uFFFF\-]|\\.)+)/,
            NAME: /\[name=['"]*((?:[\w\u00c0-\uFFFF\-]|\\.)+)['"]*\]/,
            ATTR: /\[\s*((?:[\w\u00c0-\uFFFF\-]|\\.)+)\s*(?:(\S?=)\s*(?:(['"])(.*?)\3|(#?(?:[\w\u00c0-\uFFFF\-]|\\.)*)|)|)\s*\]/,
            TAG: /^((?:[\w\u00c0-\uFFFF\*\-]|\\.)+)/,
            CHILD: /:(only|nth|last|first)-child(?:\(\s*(even|odd|(?:[+\-]?\d+|(?:[+\-]?\d*)?n\s*(?:[+\-]\s*\d+)?))\s*\))?/,
            POS: /:(nth|eq|gt|lt|first|last|even|odd)(?:\((\d*)\))?(?=[^\-]|$)/,
            PSEUDO: /:((?:[\w\u00c0-\uFFFF\-]|\\.)+)(?:\((['"]?)((?:\([^\)]+\)|[^\(\)]*)+)\2\))?/
        },

        leftMatch: {},

        attrMap: {
            "class": "className",
            "for": "htmlFor"
        },

        attrHandle: {
            href: function( elem ) {
                return elem.getAttribute( "href" );
            },
            type: function( elem ) {
                return elem.getAttribute( "type" );
            }
        },

        relative: {
            "+": function(checkSet, part){
                var isPartStr = typeof part === "string",
                    isTag = isPartStr && !rNonWord.test( part ),
                    isPartStrNotTag = isPartStr && !isTag;

                if ( isTag ) {
                    part = part.toLowerCase();
                }

                for ( var i = 0, l = checkSet.length, elem; i < l; i++ ) {
                    if ( (elem = checkSet[i]) ) {
                        while ( (elem = elem.previousSibling) && elem.nodeType !== 1 ) {}

                        checkSet[i] = isPartStrNotTag || elem && elem.nodeName.toLowerCase() === part ?
                            elem || false :
                            elem === part;
                    }
                }

                if ( isPartStrNotTag ) {
                    Sizzle.filter( part, checkSet, true );
                }
            },

            ">": function( checkSet, part ) {
                var elem,
                    isPartStr = typeof part === "string",
                    i = 0,
                    l = checkSet.length;

                if ( isPartStr && !rNonWord.test( part ) ) {
                    part = part.toLowerCase();

                    for ( ; i < l; i++ ) {
                        elem = checkSet[i];

                        if ( elem ) {
                            var parent = elem.parentNode;
                            checkSet[i] = parent.nodeName.toLowerCase() === part ? parent : false;
                        }
                    }

                } else {
                    for ( ; i < l; i++ ) {
                        elem = checkSet[i];

                        if ( elem ) {
                            checkSet[i] = isPartStr ?
                                elem.parentNode :
                                elem.parentNode === part;
                        }
                    }

                    if ( isPartStr ) {
                        Sizzle.filter( part, checkSet, true );
                    }
                }
            },

            "": function(checkSet, part, isXML){
                var nodeCheck,
                    doneName = done++,
                    checkFn = dirCheck;

                if ( typeof part === "string" && !rNonWord.test( part ) ) {
                    part = part.toLowerCase();
                    nodeCheck = part;
                    checkFn = dirNodeCheck;
                }

                checkFn( "parentNode", part, doneName, checkSet, nodeCheck, isXML );
            },

            "~": function( checkSet, part, isXML ) {
                var nodeCheck,
                    doneName = done++,
                    checkFn = dirCheck;

                if ( typeof part === "string" && !rNonWord.test( part ) ) {
                    part = part.toLowerCase();
                    nodeCheck = part;
                    checkFn = dirNodeCheck;
                }

                checkFn( "previousSibling", part, doneName, checkSet, nodeCheck, isXML );
            }
        },

        find: {
            ID: function( match, context, isXML ) {
                if ( typeof context.getElementById !== "undefined" && !isXML ) {
                    var m = context.getElementById(match[1]);
                    return m && m.parentNode ? [m] : [];
                }
            },

            NAME: function( match, context ) {
                if ( typeof context.getElementsByName !== "undefined" ) {
                    var ret = [],
                        results = context.getElementsByName( match[1] );

                    for ( var i = 0, l = results.length; i < l; i++ ) {
                        if ( results[i].getAttribute("name") === match[1] ) {
                            ret.push( results[i] );
                        }
                    }

                    return ret.length === 0 ? null : ret;
                }
            },

            TAG: function( match, context ) {
                if ( typeof context.getElementsByTagName !== "undefined" ) {
                    return context.getElementsByTagName( match[1] );
                }
            }
        },
        preFilter: {
            CLASS: function( match, curLoop, inplace, result, not, isXML ) {
                match = " " + match[1].replace( rBackslash, "" ) + " ";

                if ( isXML ) {
                    return match;
                }

                for ( var i = 0, elem; (elem = curLoop[i]) != null; i++ ) {
                    if ( elem ) {
                        if ( not ^ (elem.className && (" " + elem.className + " ").replace(/[\t\n\r]/g, " ").indexOf(match) >= 0) ) {
                            if ( !inplace ) {
                                result.push( elem );
                            }

                        } else if ( inplace ) {
                            curLoop[i] = false;
                        }
                    }
                }

                return false;
            },

            ID: function( match ) {
                return match[1].replace( rBackslash, "" );
            },

            TAG: function( match, curLoop ) {
                return match[1].replace( rBackslash, "" ).toLowerCase();
            },

            CHILD: function( match ) {
                if ( match[1] === "nth" ) {
                    if ( !match[2] ) {
                        Sizzle.error( match[0] );
                    }

                    match[2] = match[2].replace(/^\+|\s*/g, '');

                    var test = /(-?)(\d*)(?:n([+\-]?\d*))?/.exec(
                        match[2] === "even" && "2n" || match[2] === "odd" && "2n+1" ||
                            !/\D/.test( match[2] ) && "0n+" + match[2] || match[2]);

                    match[2] = (test[1] + (test[2] || 1)) - 0;
                    match[3] = test[3] - 0;
                }
                else if ( match[2] ) {
                    Sizzle.error( match[0] );
                }

                match[0] = done++;

                return match;
            },

            ATTR: function( match, curLoop, inplace, result, not, isXML ) {
                var name = match[1] = match[1].replace( rBackslash, "" );

                if ( !isXML && Expr.attrMap[name] ) {
                    match[1] = Expr.attrMap[name];
                }

                match[4] = ( match[4] || match[5] || "" ).replace( rBackslash, "" );

                if ( match[2] === "~=" ) {
                    match[4] = " " + match[4] + " ";
                }

                return match;
            },

            PSEUDO: function( match, curLoop, inplace, result, not ) {
                if ( match[1] === "not" ) {
                    if ( ( chunker.exec(match[3]) || "" ).length > 1 || /^\w/.test(match[3]) ) {
                        match[3] = Sizzle(match[3], null, null, curLoop);

                    } else {
                        var ret = Sizzle.filter(match[3], curLoop, inplace, true ^ not);

                        if ( !inplace ) {
                            result.push.apply( result, ret );
                        }

                        return false;
                    }

                } else if ( Expr.match.POS.test( match[0] ) || Expr.match.CHILD.test( match[0] ) ) {
                    return true;
                }

                return match;
            },

            POS: function( match ) {
                match.unshift( true );

                return match;
            }
        },

        filters: {
            enabled: function( elem ) {
                return elem.disabled === false && elem.type !== "hidden";
            },

            disabled: function( elem ) {
                return elem.disabled === true;
            },

            checked: function( elem ) {
                return elem.checked === true;
            },

            selected: function( elem ) {
                if ( elem.parentNode ) {
                    elem.parentNode.selectedIndex;
                }

                return elem.selected === true;
            },

            parent: function( elem ) {
                return !!elem.firstChild;
            },

            empty: function( elem ) {
                return !elem.firstChild;
            },

            has: function( elem, i, match ) {
                return !!Sizzle( match[3], elem ).length;
            },

            header: function( elem ) {
                return (/h\d/i).test( elem.nodeName );
            },

            text: function( elem ) {
                var attr = elem.getAttribute( "type" ), type = elem.type;
                return elem.nodeName.toLowerCase() === "input" && "text" === type && ( attr === type || attr === null );
            },

            radio: function( elem ) {
                return elem.nodeName.toLowerCase() === "input" && "radio" === elem.type;
            },

            checkbox: function( elem ) {
                return elem.nodeName.toLowerCase() === "input" && "checkbox" === elem.type;
            },

            file: function( elem ) {
                return elem.nodeName.toLowerCase() === "input" && "file" === elem.type;
            },

            password: function( elem ) {
                return elem.nodeName.toLowerCase() === "input" && "password" === elem.type;
            },

            submit: function( elem ) {
                var name = elem.nodeName.toLowerCase();
                return (name === "input" || name === "button") && "submit" === elem.type;
            },

            image: function( elem ) {
                return elem.nodeName.toLowerCase() === "input" && "image" === elem.type;
            },

            reset: function( elem ) {
                var name = elem.nodeName.toLowerCase();
                return (name === "input" || name === "button") && "reset" === elem.type;
            },

            button: function( elem ) {
                var name = elem.nodeName.toLowerCase();
                return name === "input" && "button" === elem.type || name === "button";
            },

            input: function( elem ) {
                return (/input|select|textarea|button/i).test( elem.nodeName );
            },

            focus: function( elem ) {
                return elem === elem.ownerDocument.activeElement;
            }
        },
        setFilters: {
            first: function( elem, i ) {
                return i === 0;
            },

            last: function( elem, i, match, array ) {
                return i === array.length - 1;
            },

            even: function( elem, i ) {
                return i % 2 === 0;
            },

            odd: function( elem, i ) {
                return i % 2 === 1;
            },

            lt: function( elem, i, match ) {
                return i < match[3] - 0;
            },

            gt: function( elem, i, match ) {
                return i > match[3] - 0;
            },

            nth: function( elem, i, match ) {
                return match[3] - 0 === i;
            },

            eq: function( elem, i, match ) {
                return match[3] - 0 === i;
            }
        },
        filter: {
            PSEUDO: function( elem, match, i, array ) {
                var name = match[1],
                    filter = Expr.filters[ name ];

                if ( filter ) {
                    return filter( elem, i, match, array );

                } else if ( name === "contains" ) {
                    return (elem.textContent || elem.innerText || Sizzle.getText([ elem ]) || "").indexOf(match[3]) >= 0;

                } else if ( name === "not" ) {
                    var not = match[3];

                    for ( var j = 0, l = not.length; j < l; j++ ) {
                        if ( not[j] === elem ) {
                            return false;
                        }
                    }

                    return true;

                } else {
                    Sizzle.error( name );
                }
            },

            CHILD: function( elem, match ) {
                var type = match[1],
                    node = elem;

                switch ( type ) {
                    case "only":
                    case "first":
                        while ( (node = node.previousSibling) )	 {
                            if ( node.nodeType === 1 ) {
                                return false;
                            }
                        }

                        if ( type === "first" ) {
                            return true;
                        }

                        node = elem;

                    case "last":
                        while ( (node = node.nextSibling) )	 {
                            if ( node.nodeType === 1 ) {
                                return false;
                            }
                        }

                        return true;

                    case "nth":
                        var first = match[2],
                            last = match[3];

                        if ( first === 1 && last === 0 ) {
                            return true;
                        }

                        var doneName = match[0],
                            parent = elem.parentNode;

                        if ( parent && (parent.sizcache !== doneName || !elem.nodeIndex) ) {
                            var count = 0;

                            for ( node = parent.firstChild; node; node = node.nextSibling ) {
                                if ( node.nodeType === 1 ) {
                                    node.nodeIndex = ++count;
                                }
                            }

                            parent.sizcache = doneName;
                        }

                        var diff = elem.nodeIndex - last;

                        if ( first === 0 ) {
                            return diff === 0;

                        } else {
                            return ( diff % first === 0 && diff / first >= 0 );
                        }
                }
            },

            ID: function( elem, match ) {
                return elem.nodeType === 1 && elem.getAttribute("id") === match;
            },

            TAG: function( elem, match ) {
                return (match === "*" && elem.nodeType === 1) || elem.nodeName.toLowerCase() === match;
            },

            CLASS: function( elem, match ) {
                return (" " + (elem.className || elem.getAttribute("class")) + " ")
                    .indexOf( match ) > -1;
            },

            ATTR: function( elem, match ) {
                var name = match[1],
                    result = Expr.attrHandle[ name ] ?
                        Expr.attrHandle[ name ]( elem ) :
                        elem[ name ] != null ?
                            elem[ name ] :
                            elem.getAttribute( name ),
                    value = result + "",
                    type = match[2],
                    check = match[4];

                return result == null ?
                    type === "!=" :
                    type === "=" ?
                        value === check :
                        type === "*=" ?
                            value.indexOf(check) >= 0 :
                            type === "~=" ?
                                (" " + value + " ").indexOf(check) >= 0 :
                                !check ?
                                    value && result !== false :
                                    type === "!=" ?
                                        value !== check :
                                        type === "^=" ?
                                            value.indexOf(check) === 0 :
                                            type === "$=" ?
                                                value.substr(value.length - check.length) === check :
                                                type === "|=" ?
                                                    value === check || value.substr(0, check.length + 1) === check + "-" :
                                                    false;
            },

            POS: function( elem, match, i, array ) {
                var name = match[2],
                    filter = Expr.setFilters[ name ];

                if ( filter ) {
                    return filter( elem, i, match, array );
                }
            }
        }
    };

    var origPOS = Expr.match.POS,
        fescape = function(all, num){
            return "\\" + (num - 0 + 1);
        };

    for ( var type in Expr.match ) {
        Expr.match[ type ] = new RegExp( Expr.match[ type ].source + (/(?![^\[]*\])(?![^\(]*\))/.source) );
        Expr.leftMatch[ type ] = new RegExp( /(^(?:.|\r|\n)*?)/.source + Expr.match[ type ].source.replace(/\\(\d+)/g, fescape) );
    }

    var makeArray = function( array, results ) {
        array = Array.prototype.slice.call( array, 0 );

        if ( results ) {
            results.push.apply( results, array );
            return results;
        }

        return array;
    };

    try {
        Array.prototype.slice.call( document.documentElement.childNodes, 0 )[0].nodeType;

    } catch( e ) {
        makeArray = function( array, results ) {
            var i = 0,
                ret = results || [];

            if ( toString.call(array) === "[object Array]" ) {
                Array.prototype.push.apply( ret, array );

            } else {
                if ( typeof array.length === "number" ) {
                    for ( var l = array.length; i < l; i++ ) {
                        ret.push( array[i] );
                    }

                } else {
                    for ( ; array[i]; i++ ) {
                        ret.push( array[i] );
                    }
                }
            }

            return ret;
        };
    }

    var sortOrder, siblingCheck;

    if ( document.documentElement.compareDocumentPosition ) {
        sortOrder = function( a, b ) {
            if ( a === b ) {
                hasDuplicate = true;
                return 0;
            }

            if ( !a.compareDocumentPosition || !b.compareDocumentPosition ) {
                return a.compareDocumentPosition ? -1 : 1;
            }

            return a.compareDocumentPosition(b) & 4 ? -1 : 1;
        };

    } else {
        sortOrder = function( a, b ) {
            if ( a === b ) {
                hasDuplicate = true;
                return 0;

            } else if ( a.sourceIndex && b.sourceIndex ) {
                return a.sourceIndex - b.sourceIndex;
            }

            var al, bl,
                ap = [],
                bp = [],
                aup = a.parentNode,
                bup = b.parentNode,
                cur = aup;

            if ( aup === bup ) {
                return siblingCheck( a, b );

            } else if ( !aup ) {
                return -1;

            } else if ( !bup ) {
                return 1;
            }

            while ( cur ) {
                ap.unshift( cur );
                cur = cur.parentNode;
            }

            cur = bup;

            while ( cur ) {
                bp.unshift( cur );
                cur = cur.parentNode;
            }

            al = ap.length;
            bl = bp.length;

            for ( var i = 0; i < al && i < bl; i++ ) {
                if ( ap[i] !== bp[i] ) {
                    return siblingCheck( ap[i], bp[i] );
                }
            }

            return i === al ?
                siblingCheck( a, bp[i], -1 ) :
                siblingCheck( ap[i], b, 1 );
        };

        siblingCheck = function( a, b, ret ) {
            if ( a === b ) {
                return ret;
            }

            var cur = a.nextSibling;

            while ( cur ) {
                if ( cur === b ) {
                    return -1;
                }

                cur = cur.nextSibling;
            }

            return 1;
        };
    }

    Sizzle.getText = function( elems ) {
        var ret = "", elem;

        for ( var i = 0; elems[i]; i++ ) {
            elem = elems[i];

            if ( elem.nodeType === 3 || elem.nodeType === 4 ) {
                ret += elem.nodeValue;

            } else if ( elem.nodeType !== 8 ) {
                ret += Sizzle.getText( elem.childNodes );
            }
        }

        return ret;
    };

    (function(){
        var form = document.createElement("div"),
            id = "script" + (new Date()).getTime(),
            root = document.documentElement;

        form.innerHTML = "<a name='" + id + "'/>";

        root.insertBefore( form, root.firstChild );

        if ( document.getElementById( id ) ) {
            Expr.find.ID = function( match, context, isXML ) {
                if ( typeof context.getElementById !== "undefined" && !isXML ) {
                    var m = context.getElementById(match[1]);

                    return m ?
                        m.id === match[1] || typeof m.getAttributeNode !== "undefined" && m.getAttributeNode("id").nodeValue === match[1] ?
                            [m] :
                            undefined :
                        [];
                }
            };

            Expr.filter.ID = function( elem, match ) {
                var node = typeof elem.getAttributeNode !== "undefined" && elem.getAttributeNode("id");

                return elem.nodeType === 1 && node && node.nodeValue === match;
            };
        }

        root.removeChild( form );

        root = form = null;
    })();

    (function(){

        var div = document.createElement("div");
        div.appendChild( document.createComment("") );

        if ( div.getElementsByTagName("*").length > 0 ) {
            Expr.find.TAG = function( match, context ) {
                var results = context.getElementsByTagName( match[1] );

                if ( match[1] === "*" ) {
                    var tmp = [];

                    for ( var i = 0; results[i]; i++ ) {
                        if ( results[i].nodeType === 1 ) {
                            tmp.push( results[i] );
                        }
                    }

                    results = tmp;
                }

                return results;
            };
        }

        div.innerHTML = "<a href='#'></a>";

        if ( div.firstChild && typeof div.firstChild.getAttribute !== "undefined" &&
            div.firstChild.getAttribute("href") !== "#" ) {

            Expr.attrHandle.href = function( elem ) {
                return elem.getAttribute( "href", 2 );
            };
        }

        div = null;
    })();

    if ( document.querySelectorAll ) {
        (function(){
            var oldSizzle = Sizzle,
                div = document.createElement("div"),
                id = "__sizzle__";

            div.innerHTML = "<p class='TEST'></p>";

            if ( div.querySelectorAll && div.querySelectorAll(".TEST").length === 0 ) {
                return;
            }

            Sizzle = function( query, context, extra, seed ) {
                context = context || document;

                if ( !seed && !Sizzle.isXML(context) ) {
                    var match = /^(\w+$)|^\.([\w\-]+$)|^#([\w\-]+$)/.exec( query );

                    if ( match && (context.nodeType === 1 || context.nodeType === 9) ) {
                        if ( match[1] ) {
                            return makeArray( context.getElementsByTagName( query ), extra );

                        } else if ( match[2] && Expr.find.CLASS && context.getElementsByClassName ) {
                            return makeArray( context.getElementsByClassName( match[2] ), extra );
                        }
                    }

                    if ( context.nodeType === 9 ) {
                        if ( query === "body" && context.body ) {
                            return makeArray( [ context.body ], extra );

                        } else if ( match && match[3] ) {
                            var elem = context.getElementById( match[3] );

                            if ( elem && elem.parentNode ) {
                                if ( elem.id === match[3] ) {
                                    return makeArray( [ elem ], extra );
                                }

                            } else {
                                return makeArray( [], extra );
                            }
                        }

                        try {
                            return makeArray( context.querySelectorAll(query), extra );
                        } catch(qsaError) {}

                    } else if ( context.nodeType === 1 && context.nodeName.toLowerCase() !== "object" ) {
                        var oldContext = context,
                            old = context.getAttribute( "id" ),
                            nid = old || id,
                            hasParent = context.parentNode,
                            relativeHierarchySelector = /^\s*[+~]/.test( query );

                        if ( !old ) {
                            context.setAttribute( "id", nid );
                        } else {
                            nid = nid.replace( /'/g, "\\$&" );
                        }
                        if ( relativeHierarchySelector && hasParent ) {
                            context = context.parentNode;
                        }

                        try {
                            if ( !relativeHierarchySelector || hasParent ) {
                                return makeArray( context.querySelectorAll( "[id='" + nid + "'] " + query ), extra );
                            }

                        } catch(pseudoError) {
                        } finally {
                            if ( !old ) {
                                oldContext.removeAttribute( "id" );
                            }
                        }
                    }
                }

                return oldSizzle(query, context, extra, seed);
            };

            for ( var prop in oldSizzle ) {
                Sizzle[ prop ] = oldSizzle[ prop ];
            }

            div = null;
        })();
    }

    (function(){
        var html = document.documentElement,
            matches = html.matchesSelector || html.mozMatchesSelector || html.webkitMatchesSelector || html.msMatchesSelector;

        if ( matches ) {
            var disconnectedMatch = !matches.call( document.createElement( "div" ), "div" ),
                pseudoWorks = false;

            try {
                matches.call( document.documentElement, "[test!='']:sizzle" );

            } catch( pseudoError ) {
                pseudoWorks = true;
            }

            Sizzle.matchesSelector = function( node, expr ) {
                expr = expr.replace(/\=\s*([^'"\]]*)\s*\]/g, "='$1']");

                if ( !Sizzle.isXML( node ) ) {
                    try {
                        if ( pseudoWorks || !Expr.match.PSEUDO.test( expr ) && !/!=/.test( expr ) ) {
                            var ret = matches.call( node, expr );

                            if ( ret || !disconnectedMatch ||
                                node.document && node.document.nodeType !== 11 ) {
                                return ret;
                            }
                        }
                    } catch(e) {}
                }

                return Sizzle(expr, null, null, [node]).length > 0;
            };
        }
    })();

    (function(){
        var div = document.createElement("div");

        div.innerHTML = "<div class='test e'></div><div class='test'></div>";

        if ( !div.getElementsByClassName || div.getElementsByClassName("e").length === 0 ) {
            return;
        }

        div.lastChild.className = "e";

        if ( div.getElementsByClassName("e").length === 1 ) {
            return;
        }

        Expr.order.splice(1, 0, "CLASS");
        Expr.find.CLASS = function( match, context, isXML ) {
            if ( typeof context.getElementsByClassName !== "undefined" && !isXML ) {
                return context.getElementsByClassName(match[1]);
            }
        };

        div = null;
    })();

    function dirNodeCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
        for ( var i = 0, l = checkSet.length; i < l; i++ ) {
            var elem = checkSet[i];

            if ( elem ) {
                var match = false;

                elem = elem[dir];

                while ( elem ) {
                    if ( elem.sizcache === doneName ) {
                        match = checkSet[elem.sizset];
                        break;
                    }

                    if ( elem.nodeType === 1 && !isXML ){
                        elem.sizcache = doneName;
                        elem.sizset = i;
                    }

                    if ( elem.nodeName.toLowerCase() === cur ) {
                        match = elem;
                        break;
                    }

                    elem = elem[dir];
                }

                checkSet[i] = match;
            }
        }
    }

    function dirCheck( dir, cur, doneName, checkSet, nodeCheck, isXML ) {
        for ( var i = 0, l = checkSet.length; i < l; i++ ) {
            var elem = checkSet[i];

            if ( elem ) {
                var match = false;

                elem = elem[dir];

                while ( elem ) {
                    if ( elem.sizcache === doneName ) {
                        match = checkSet[elem.sizset];
                        break;
                    }

                    if ( elem.nodeType === 1 ) {
                        if ( !isXML ) {
                            elem.sizcache = doneName;
                            elem.sizset = i;
                        }

                        if ( typeof cur !== "string" ) {
                            if ( elem === cur ) {
                                match = true;
                                break;
                            }

                        } else if ( Sizzle.filter( cur, [elem] ).length > 0 ) {
                            match = elem;
                            break;
                        }
                    }

                    elem = elem[dir];
                }

                checkSet[i] = match;
            }
        }
    }

    if ( document.documentElement.contains ) {
        Sizzle.contains = function( a, b ) {
            return a !== b && (a.contains ? a.contains(b) : true);
        };

    } else if ( document.documentElement.compareDocumentPosition ) {
        Sizzle.contains = function( a, b ) {
            return !!(a.compareDocumentPosition(b) & 16);
        };

    } else {
        Sizzle.contains = function() {
            return false;
        };
    }

    Sizzle.isXML = function( elem ) {
        var documentElement = (elem ? elem.ownerDocument || elem : 0).documentElement;

        return documentElement ? documentElement.nodeName !== "HTML" : false;
    };

    var posProcess = function( selector, context ) {
        var match,
            tmpSet = [],
            later = "",
            root = context.nodeType ? [context] : context;

        while ( (match = Expr.match.PSEUDO.exec( selector )) ) {
            later += match[0];
            selector = selector.replace( Expr.match.PSEUDO, "" );
        }

        selector = Expr.relative[selector] ? selector + "*" : selector;

        for ( var i = 0, l = root.length; i < l; i++ ) {
            Sizzle( selector, root[i], tmpSet );
        }

        return Sizzle.filter( later, tmpSet );
    };


    window.Sizzle = Sizzle;

})();

Prototype._original_property = window.Sizzle;

;(function(engine) {
    var extendElements = Prototype.Selector.extendElements;

    function select(selector, scope) {
        return extendElements(engine(selector, scope || document));
    }

    function match(element, selector) {
        return engine.matches(selector, [element]).length == 1;
    }

    Prototype.Selector.engine = engine;
    Prototype.Selector.select = select;
    Prototype.Selector.match = match;
})(Sizzle);

window.Sizzle = Prototype._original_property;
delete Prototype._original_property;

var Form = {
    reset: function(form) {
        form = $(form);
        form.reset();
        return form;
    },

    serializeElements: function(elements, options) {
        if (typeof options != 'object') options = { hash: !!options };
        else if (Object.isUndefined(options.hash)) options.hash = true;
        var key, value, submitted = false, submit = options.submit, accumulator, initial;

        if (options.hash) {
            initial = {};
            accumulator = function(result, key, value) {
                if (key in result) {
                    if (!Object.isArray(result[key])) result[key] = [result[key]];
                    result[key].push(value);
                } else result[key] = value;
                return result;
            };
        } else {
            initial = '';
            accumulator = function(result, key, value) {
                value = value.gsub(/(\r)?\n/, '\r\n');
                value = encodeURIComponent(value);
                value = value.gsub(/%20/, '+');
                return result + (result ? '&' : '') + encodeURIComponent(key) + '=' + value;
            }
        }

        return elements.inject(initial, function(result, element) {
            if (!element.disabled && element.name) {
                key = element.name; value = $(element).getValue();
                if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&
                    submit !== false && (!submit || key == submit) && (submitted = true)))) {
                    result = accumulator(result, key, value);
                }
            }
            return result;
        });
    }
};

Form.Methods = {
    serialize: function(form, options) {
        return Form.serializeElements(Form.getElements(form), options);
    },


    getElements: function(form) {
        var elements = $(form).getElementsByTagName('*');
        var element, results = [], serializers = Form.Element.Serializers;

        for (var i = 0; element = elements[i]; i++) {
            if (serializers[element.tagName.toLowerCase()])
                results.push(Element.extend(element));
        }
        return results;
    },

    getInputs: function(form, typeName, name) {
        form = $(form);
        var inputs = form.getElementsByTagName('input');

        if (!typeName && !name) return $A(inputs).map(Element.extend);

        for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
            var input = inputs[i];
            if ((typeName && input.type != typeName) || (name && input.name != name))
                continue;
            matchingInputs.push(Element.extend(input));
        }

        return matchingInputs;
    },

    disable: function(form) {
        form = $(form);
        Form.getElements(form).invoke('disable');
        return form;
    },

    enable: function(form) {
        form = $(form);
        Form.getElements(form).invoke('enable');
        return form;
    },

    findFirstElement: function(form) {
        var elements = $(form).getElements().findAll(function(element) {
            return 'hidden' != element.type && !element.disabled;
        });
        var firstByIndex = elements.findAll(function(element) {
            return element.hasAttribute('tabIndex') && element.tabIndex >= 0;
        }).sortBy(function(element) { return element.tabIndex }).first();

        return firstByIndex ? firstByIndex : elements.find(function(element) {
            return /^(?:input|select|textarea)$/i.test(element.tagName);
        });
    },

    focusFirstElement: function(form) {
        form = $(form);
        var element = form.findFirstElement();
        if (element) element.activate();
        return form;
    },

    request: function(form, options) {
        form = $(form), options = Object.clone(options || { });

        var params = options.parameters, action = form.readAttribute('action') || '';
        if (action.blank()) action = window.location.href;
        options.parameters = form.serialize(true);

        if (params) {
            if (Object.isString(params)) params = params.toQueryParams();
            Object.extend(options.parameters, params);
        }

        if (form.hasAttribute('method') && !options.method)
            options.method = form.method;

        return new Ajax.Request(action, options);
    }
};

/*--------------------------------------------------------------------------*/


Form.Element = {
    focus: function(element) {
        $(element).focus();
        return element;
    },

    select: function(element) {
        $(element).select();
        return element;
    }
};

Form.Element.Methods = {

    serialize: function(element) {
        element = $(element);
        if (!element.disabled && element.name) {
            var value = element.getValue();
            if (value != undefined) {
                var pair = { };
                pair[element.name] = value;
                return Object.toQueryString(pair);
            }
        }
        return '';
    },

    getValue: function(element) {
        element = $(element);
        var method = element.tagName.toLowerCase();
        return Form.Element.Serializers[method](element);
    },

    setValue: function(element, value) {
        element = $(element);
        var method = element.tagName.toLowerCase();
        Form.Element.Serializers[method](element, value);
        return element;
    },

    clear: function(element) {
        $(element).value = '';
        return element;
    },

    present: function(element) {
        return $(element).value != '';
    },

    activate: function(element) {
        element = $(element);
        try {
            element.focus();
            if (element.select && (element.tagName.toLowerCase() != 'input' ||
                !(/^(?:button|reset|submit)$/i.test(element.type))))
                element.select();
        } catch (e) { }
        return element;
    },

    disable: function(element) {
        element = $(element);
        element.disabled = true;
        return element;
    },

    enable: function(element) {
        element = $(element);
        element.disabled = false;
        return element;
    }
};

/*--------------------------------------------------------------------------*/

var Field = Form.Element;

var $F = Form.Element.Methods.getValue;

/*--------------------------------------------------------------------------*/

Form.Element.Serializers = (function() {
    function input(element, value) {
        switch (element.type.toLowerCase()) {
            case 'checkbox':
            case 'radio':
                return inputSelector(element, value);
            default:
                return valueSelector(element, value);
        }
    }

    function inputSelector(element, value) {
        if (Object.isUndefined(value))
            return element.checked ? element.value : null;
        else element.checked = !!value;
    }

    function valueSelector(element, value) {
        if (Object.isUndefined(value)) return element.value;
        else element.value = value;
    }

    function select(element, value) {
        if (Object.isUndefined(value))
            return (element.type === 'select-one' ? selectOne : selectMany)(element);

        var opt, currentValue, single = !Object.isArray(value);
        for (var i = 0, length = element.length; i < length; i++) {
            opt = element.options[i];
            currentValue = this.optionValue(opt);
            if (single) {
                if (currentValue == value) {
                    opt.selected = true;
                    return;
                }
            }
            else opt.selected = value.include(currentValue);
        }
    }

    function selectOne(element) {
        var index = element.selectedIndex;
        return index >= 0 ? optionValue(element.options[index]) : null;
    }

    function selectMany(element) {
        var values, length = element.length;
        if (!length) return null;

        for (var i = 0, values = []; i < length; i++) {
            var opt = element.options[i];
            if (opt.selected) values.push(optionValue(opt));
        }
        return values;
    }

    function optionValue(opt) {
        return Element.hasAttribute(opt, 'value') ? opt.value : opt.text;
    }

    return {
        input:         input,
        inputSelector: inputSelector,
        textarea:      valueSelector,
        select:        select,
        selectOne:     selectOne,
        selectMany:    selectMany,
        optionValue:   optionValue,
        button:        valueSelector
    };
})();

/*--------------------------------------------------------------------------*/


Abstract.TimedObserver = Class.create(PeriodicalExecuter, {
    initialize: function($super, element, frequency, callback) {
        $super(callback, frequency);
        this.element   = $(element);
        this.lastValue = this.getValue();
    },

    execute: function() {
        var value = this.getValue();
        if (Object.isString(this.lastValue) && Object.isString(value) ?
            this.lastValue != value : String(this.lastValue) != String(value)) {
            this.callback(this.element, value);
            this.lastValue = value;
        }
    }
});

Form.Element.Observer = Class.create(Abstract.TimedObserver, {
    getValue: function() {
        return Form.Element.getValue(this.element);
    }
});

Form.Observer = Class.create(Abstract.TimedObserver, {
    getValue: function() {
        return Form.serialize(this.element);
    }
});

/*--------------------------------------------------------------------------*/

Abstract.EventObserver = Class.create({
    initialize: function(element, callback) {
        this.element  = $(element);
        this.callback = callback;

        this.lastValue = this.getValue();
        if (this.element.tagName.toLowerCase() == 'form')
            this.registerFormCallbacks();
        else
            this.registerCallback(this.element);
    },

    onElementEvent: function() {
        var value = this.getValue();
        if (this.lastValue != value) {
            this.callback(this.element, value);
            this.lastValue = value;
        }
    },

    registerFormCallbacks: function() {
        Form.getElements(this.element).each(this.registerCallback, this);
    },

    registerCallback: function(element) {
        if (element.type) {
            switch (element.type.toLowerCase()) {
                case 'checkbox':
                case 'radio':
                    Event.observe(element, 'click', this.onElementEvent.bind(this));
                    break;
                default:
                    Event.observe(element, 'change', this.onElementEvent.bind(this));
                    break;
            }
        }
    }
});

Form.Element.EventObserver = Class.create(Abstract.EventObserver, {
    getValue: function() {
        return Form.Element.getValue(this.element);
    }
});

Form.EventObserver = Class.create(Abstract.EventObserver, {
    getValue: function() {
        return Form.serialize(this.element);
    }
});
(function(GLOBAL) {
    var DIV = document.createElement('div');
    var docEl = document.documentElement;
    var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
        && 'onmouseleave' in docEl;

    var Event = {
        KEY_BACKSPACE: 8,
        KEY_TAB:       9,
        KEY_RETURN:   13,
        KEY_ESC:      27,
        KEY_LEFT:     37,
        KEY_UP:       38,
        KEY_RIGHT:    39,
        KEY_DOWN:     40,
        KEY_DELETE:   46,
        KEY_HOME:     36,
        KEY_END:      35,
        KEY_PAGEUP:   33,
        KEY_PAGEDOWN: 34,
        KEY_INSERT:   45
    };


    var isIELegacyEvent = function(event) { return false; };

    if (window.attachEvent) {
        if (window.addEventListener) {
            isIELegacyEvent = function(event) {
                return !(event instanceof window.Event);
            };
        } else {
            isIELegacyEvent = function(event) { return true; };
        }
    }

    var _isButton;

    function _isButtonForDOMEvents(event, code) {
        return event.which ? (event.which === code + 1) : (event.button === code);
    }

    var legacyButtonMap = { 0: 1, 1: 4, 2: 2 };
    function _isButtonForLegacyEvents(event, code) {
        return event.button === legacyButtonMap[code];
    }

    function _isButtonForWebKit(event, code) {
        switch (code) {
            case 0: return event.which == 1 && !event.metaKey;
            case 1: return event.which == 2 || (event.which == 1 && event.metaKey);
            case 2: return event.which == 3;
            default: return false;
        }
    }

    if (window.attachEvent) {
        if (!window.addEventListener) {
            _isButton = _isButtonForLegacyEvents;
        } else {
            _isButton = function(event, code) {
                return isIELegacyEvent(event) ? _isButtonForLegacyEvents(event, code) :
                    _isButtonForDOMEvents(event, code);
            }
        }
    } else if (Prototype.Browser.WebKit) {
        _isButton = _isButtonForWebKit;
    } else {
        _isButton = _isButtonForDOMEvents;
    }

    function isLeftClick(event)   { return _isButton(event, 0) }

    function isMiddleClick(event) { return _isButton(event, 1) }

    function isRightClick(event)  { return _isButton(event, 2) }

    function element(event) {
        return Element.extend(_element(event));
    }

    function _element(event) {
        event = Event.extend(event);

        var node = event.target, type = event.type,
            currentTarget = event.currentTarget;

        if (currentTarget && currentTarget.tagName) {
            if (type === 'load' || type === 'error' ||
                (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'
                    && currentTarget.type === 'radio'))
                node = currentTarget;
        }

        if (node.nodeType == Node.TEXT_NODE)
            node = node.parentNode;

        return Element.extend(node);
    }

    function findElement(event, expression) {
        var element = _element(event), match = Prototype.Selector.match;
        if (!expression) return Element.extend(element);
        while (element) {
            if (Object.isElement(element) && match(element, expression))
                return Element.extend(element);
            element = element.parentNode;
        }
    }

    function pointer(event) {
        return { x: pointerX(event), y: pointerY(event) };
    }

    function pointerX(event) {
        var docElement = document.documentElement,
            body = document.body || { scrollLeft: 0 };

        return event.pageX || (event.clientX +
            (docElement.scrollLeft || body.scrollLeft) -
            (docElement.clientLeft || 0));
    }

    function pointerY(event) {
        var docElement = document.documentElement,
            body = document.body || { scrollTop: 0 };

        return  event.pageY || (event.clientY +
            (docElement.scrollTop || body.scrollTop) -
            (docElement.clientTop || 0));
    }


    function stop(event) {
        Event.extend(event);
        event.preventDefault();
        event.stopPropagation();

        event.stopped = true;
    }


    Event.Methods = {
        isLeftClick:   isLeftClick,
        isMiddleClick: isMiddleClick,
        isRightClick:  isRightClick,

        element:     element,
        findElement: findElement,

        pointer:  pointer,
        pointerX: pointerX,
        pointerY: pointerY,

        stop: stop
    };

    var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {
        m[name] = Event.Methods[name].methodize();
        return m;
    });

    if (window.attachEvent) {
        function _relatedTarget(event) {
            var element;
            switch (event.type) {
                case 'mouseover':
                case 'mouseenter':
                    element = event.fromElement;
                    break;
                case 'mouseout':
                case 'mouseleave':
                    element = event.toElement;
                    break;
                default:
                    return null;
            }
            return Element.extend(element);
        }

        var additionalMethods = {
            stopPropagation: function() { this.cancelBubble = true },
            preventDefault:  function() { this.returnValue = false },
            inspect: function() { return '[object Event]' }
        };

        Event.extend = function(event, element) {
            if (!event) return false;

            if (!isIELegacyEvent(event)) return event;

            if (event._extendedByPrototype) return event;
            event._extendedByPrototype = Prototype.emptyFunction;

            var pointer = Event.pointer(event);

            Object.extend(event, {
                target: event.srcElement || element,
                relatedTarget: _relatedTarget(event),
                pageX:  pointer.x,
                pageY:  pointer.y
            });

            Object.extend(event, methods);
            Object.extend(event, additionalMethods);

            return event;
        };
    } else {
        Event.extend = Prototype.K;
    }

    if (window.addEventListener) {
        Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;
        Object.extend(Event.prototype, methods);
    }

    var EVENT_TRANSLATIONS = {
        mouseenter: 'mouseover',
        mouseleave: 'mouseout'
    };

    function getDOMEventName(eventName) {
        return EVENT_TRANSLATIONS[eventName] || eventName;
    }

    if (MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED)
        getDOMEventName = Prototype.K;

    function getUniqueElementID(element) {
        if (element === window) return 0;

        if (typeof element._prototypeUID === 'undefined')
            element._prototypeUID = Element.Storage.UID++;
        return element._prototypeUID;
    }

    function getUniqueElementID_IE(element) {
        if (element === window) return 0;
        if (element == document) return 1;
        return element.uniqueID;
    }

    if ('uniqueID' in DIV)
        getUniqueElementID = getUniqueElementID_IE;

    function isCustomEvent(eventName) {
        return eventName.include(':');
    }

    Event._isCustomEvent = isCustomEvent;

    function getRegistryForElement(element, uid) {
        var CACHE = GLOBAL.Event.cache;
        if (Object.isUndefined(uid))
            uid = getUniqueElementID(element);
        if (!CACHE[uid]) CACHE[uid] = { element: element };
        return CACHE[uid];
    }

    function destroyRegistryForElement(element, uid) {
        if (Object.isUndefined(uid))
            uid = getUniqueElementID(element);
        delete GLOBAL.Event.cache[uid];
    }


    function register(element, eventName, handler) {
        var registry = getRegistryForElement(element);
        if (!registry[eventName]) registry[eventName] = [];
        var entries = registry[eventName];

        var i = entries.length;
        while (i--)
            if (entries[i].handler === handler) return null;

        var uid = getUniqueElementID(element);
        var responder = GLOBAL.Event._createResponder(uid, eventName, handler);
        var entry = {
            responder: responder,
            handler:   handler
        };

        entries.push(entry);
        return entry;
    }

    function unregister(element, eventName, handler) {
        var registry = getRegistryForElement(element);
        var entries = registry[eventName];
        if (!entries) return;

        var i = entries.length, entry;
        while (i--) {
            if (entries[i].handler === handler) {
                entry = entries[i];
                break;
            }
        }

        if (!entry) return;

        var index = entries.indexOf(entry);
        entries.splice(index, 1);

        return entry;
    }


    function observe(element, eventName, handler) {
        element = $(element);
        var entry = register(element, eventName, handler);

        if (entry === null) return element;

        var responder = entry.responder;
        if (isCustomEvent(eventName))
            observeCustomEvent(element, eventName, responder);
        else
            observeStandardEvent(element, eventName, responder);

        return element;
    }

    function observeStandardEvent(element, eventName, responder) {
        var actualEventName = getDOMEventName(eventName);
        if (element.addEventListener) {
            element.addEventListener(actualEventName, responder, false);
        } else {
            element.attachEvent('on' + actualEventName, responder);
        }
    }

    function observeCustomEvent(element, eventName, responder) {
        if (element.addEventListener) {
            element.addEventListener('dataavailable', responder, false);
        } else {
            element.attachEvent('ondataavailable', responder);
            element.attachEvent('onlosecapture',   responder);
        }
    }

    function stopObserving(element, eventName, handler) {
        element = $(element);
        var handlerGiven = !Object.isUndefined(handler),
            eventNameGiven = !Object.isUndefined(eventName);

        if (!eventNameGiven && !handlerGiven) {
            stopObservingElement(element);
            return element;
        }

        if (!handlerGiven) {
            stopObservingEventName(element, eventName);
            return element;
        }

        var entry = unregister(element, eventName, handler);

        if (!entry) return element;
        removeEvent(element, eventName, entry.responder);
        return element;
    }

    function stopObservingStandardEvent(element, eventName, responder) {
        var actualEventName = getDOMEventName(eventName);
        if (element.removeEventListener) {
            element.removeEventListener(actualEventName, responder, false);
        } else {
            element.detachEvent('on' + actualEventName, responder);
        }
    }

    function stopObservingCustomEvent(element, eventName, responder) {
        if (element.removeEventListener) {
            element.removeEventListener('dataavailable', responder, false);
        } else {
            element.detachEvent('ondataavailable', responder);
            element.detachEvent('onlosecapture',   responder);
        }
    }



    function stopObservingElement(element) {
        var uid = getUniqueElementID(element),
            registry = getRegistryForElement(element, uid);

        destroyRegistryForElement(element, uid);

        var entries, i;
        for (var eventName in registry) {
            if (eventName === 'element') continue;

            entries = registry[eventName];
            i = entries.length;
            while (i--)
                removeEvent(element, eventName, entries[i].responder);
        }
    }

    function stopObservingEventName(element, eventName) {
        var registry = getRegistryForElement(element);
        var entries = registry[eventName];
        if (!entries) return;
        delete registry[eventName];

        var i = entries.length;
        while (i--)
            removeEvent(element, eventName, entries[i].responder);
    }


    function removeEvent(element, eventName, handler) {
        if (isCustomEvent(eventName))
            stopObservingCustomEvent(element, eventName, handler);
        else
            stopObservingStandardEvent(element, eventName, handler);
    }



    function getFireTarget(element) {
        if (element !== document) return element;
        if (document.createEvent && !element.dispatchEvent)
            return document.documentElement;
        return element;
    }

    function fire(element, eventName, memo, bubble) {
        element = getFireTarget($(element));
        if (Object.isUndefined(bubble)) bubble = true;
        memo = memo || {};

        var event = fireEvent(element, eventName, memo, bubble);
        return Event.extend(event);
    }

    function fireEvent_DOM(element, eventName, memo, bubble) {
        var event = document.createEvent('HTMLEvents');
        event.initEvent('dataavailable', bubble, true);

        event.eventName = eventName;
        event.memo = memo;

        element.dispatchEvent(event);
        return event;
    }

    function fireEvent_IE(element, eventName, memo, bubble) {
        var event = document.createEventObject();
        event.eventType = bubble ? 'ondataavailable' : 'onlosecapture';

        event.eventName = eventName;
        event.memo = memo;

        element.fireEvent(event.eventType, event);
        return event;
    }

    var fireEvent = document.createEvent ? fireEvent_DOM : fireEvent_IE;



    Event.Handler = Class.create({
        initialize: function(element, eventName, selector, callback) {
            this.element   = $(element);
            this.eventName = eventName;
            this.selector  = selector;
            this.callback  = callback;
            this.handler   = this.handleEvent.bind(this);
        },


        start: function() {
            Event.observe(this.element, this.eventName, this.handler);
            return this;
        },

        stop: function() {
            Event.stopObserving(this.element, this.eventName, this.handler);
            return this;
        },

        handleEvent: function(event) {
            var element = Event.findElement(event, this.selector);
            if (element) this.callback.call(this.element, event, element);
        }
    });

    function on(element, eventName, selector, callback) {
        element = $(element);
        if (Object.isFunction(selector) && Object.isUndefined(callback)) {
            callback = selector, selector = null;
        }

        return new Event.Handler(element, eventName, selector, callback).start();
    }

    Object.extend(Event, Event.Methods);

    Object.extend(Event, {
        fire:          fire,
        observe:       observe,
        stopObserving: stopObserving,
        on:            on
    });

    Element.addMethods({
        fire:          fire,

        observe:       observe,

        stopObserving: stopObserving,

        on:            on
    });

    Object.extend(document, {
        fire:          fire.methodize(),

        observe:       observe.methodize(),

        stopObserving: stopObserving.methodize(),

        on:            on.methodize(),

        loaded:        false
    });

    if (GLOBAL.Event) Object.extend(window.Event, Event);
    else GLOBAL.Event = Event;

    GLOBAL.Event.cache = {};

    function destroyCache_IE() {
        GLOBAL.Event.cache = null;
    }

    if (window.attachEvent)
        window.attachEvent('onunload', destroyCache_IE);

    DIV = null;
    docEl = null;
})(this);

(function(GLOBAL) {
    /* Code for creating leak-free event responders is based on work by
     John-David Dalton. */

    var docEl = document.documentElement;
    var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl
        && 'onmouseleave' in docEl;

    function isSimulatedMouseEnterLeaveEvent(eventName) {
        return !MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&
            (eventName === 'mouseenter' || eventName === 'mouseleave');
    }

    function createResponder(uid, eventName, handler) {
        if (Event._isCustomEvent(eventName))
            return createResponderForCustomEvent(uid, eventName, handler);
        if (isSimulatedMouseEnterLeaveEvent(eventName))
            return createMouseEnterLeaveResponder(uid, eventName, handler);

        return function(event) {
            var cacheEntry = Event.cache[uid];
            var element = cacheEntry.element;

            Event.extend(event, element);
            handler.call(element, event);
        };
    }

    function createResponderForCustomEvent(uid, eventName, handler) {
        return function(event) {
            var cacheEntry = Event.cache[uid], element = cacheEntry.element;

            if (Object.isUndefined(event.eventName))
                return false;

            if (event.eventName !== eventName)
                return false;

            Event.extend(event, element);
            handler.call(element, event);
        };
    }

    function createMouseEnterLeaveResponder(uid, eventName, handler) {
        return function(event) {
            var cacheEntry = Event.cache[uid], element = cacheEntry.element;

            Event.extend(event, element);
            var parent = event.relatedTarget;

            while (parent && parent !== element) {
                try { parent = parent.parentNode; }
                catch(e) { parent = element; }
            }

            if (parent === element) return;
            handler.call(element, event);
        }
    }

    GLOBAL.Event._createResponder = createResponder;
    docEl = null;
})(this);

(function(GLOBAL) {
    /* Support for the DOMContentLoaded event is based on work by Dan Webb,
     Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */

    var TIMER;

    function fireContentLoadedEvent() {
        if (document.loaded) return;
        if (TIMER) window.clearTimeout(TIMER);
        document.loaded = true;
        document.fire('dom:loaded');
    }

    function checkReadyState() {
        if (document.readyState === 'complete') {
            document.detachEvent('onreadystatechange', checkReadyState);
            fireContentLoadedEvent();
        }
    }

    function pollDoScroll() {
        try {
            document.documentElement.doScroll('left');
        } catch (e) {
            TIMER = pollDoScroll.defer();
            return;
        }

        fireContentLoadedEvent();
    }

    if (document.addEventListener) {
        document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);
    } else {
        document.attachEvent('onreadystatechange', checkReadyState);
        if (window == top) TIMER = pollDoScroll.defer();
    }

    Event.observe(window, 'load', fireContentLoadedEvent);
})(this);


Element.addMethods();
/*------------------------------- DEPRECATED -------------------------------*/

Hash.toQueryString = Object.toQueryString;

var Toggle = { display: Element.toggle };

Element.Methods.childOf = Element.Methods.descendantOf;

var Insertion = {
    Before: function(element, content) {
        return Element.insert(element, {before:content});
    },

    Top: function(element, content) {
        return Element.insert(element, {top:content});
    },

    Bottom: function(element, content) {
        return Element.insert(element, {bottom:content});
    },

    After: function(element, content) {
        return Element.insert(element, {after:content});
    }
};

var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

var Position = {
    includeScrollOffsets: false,

    prepare: function() {
        this.deltaX =  window.pageXOffset
            || document.documentElement.scrollLeft
            || document.body.scrollLeft
            || 0;
        this.deltaY =  window.pageYOffset
            || document.documentElement.scrollTop
            || document.body.scrollTop
            || 0;
    },

    within: function(element, x, y) {
        if (this.includeScrollOffsets)
            return this.withinIncludingScrolloffsets(element, x, y);
        this.xcomp = x;
        this.ycomp = y;
        this.offset = Element.cumulativeOffset(element);

        return (y >= this.offset[1] &&
            y <  this.offset[1] + element.offsetHeight &&
            x >= this.offset[0] &&
            x <  this.offset[0] + element.offsetWidth);
    },

    withinIncludingScrolloffsets: function(element, x, y) {
        var offsetcache = Element.cumulativeScrollOffset(element);

        this.xcomp = x + offsetcache[0] - this.deltaX;
        this.ycomp = y + offsetcache[1] - this.deltaY;
        this.offset = Element.cumulativeOffset(element);

        return (this.ycomp >= this.offset[1] &&
            this.ycomp <  this.offset[1] + element.offsetHeight &&
            this.xcomp >= this.offset[0] &&
            this.xcomp <  this.offset[0] + element.offsetWidth);
    },

    overlap: function(mode, element) {
        if (!mode) return 0;
        if (mode == 'vertical')
            return ((this.offset[1] + element.offsetHeight) - this.ycomp) /
                element.offsetHeight;
        if (mode == 'horizontal')
            return ((this.offset[0] + element.offsetWidth) - this.xcomp) /
                element.offsetWidth;
    },


    cumulativeOffset: Element.Methods.cumulativeOffset,

    positionedOffset: Element.Methods.positionedOffset,

    absolutize: function(element) {
        Position.prepare();
        return Element.absolutize(element);
    },

    relativize: function(element) {
        Position.prepare();
        return Element.relativize(element);
    },

    realOffset: Element.Methods.cumulativeScrollOffset,

    offsetParent: Element.Methods.getOffsetParent,

    page: Element.Methods.viewportOffset,

    clone: function(source, target, options) {
        options = options || { };
        return Element.clonePosition(target, source, options);
    }
};

/*--------------------------------------------------------------------------*/

if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){
    function iter(name) {
        return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";
    }

    instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?
        function(element, className) {
            className = className.toString().strip();
            var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);
            return cond ? document._getElementsByXPath('.//*' + cond, element) : [];
        } : function(element, className) {
        className = className.toString().strip();
        var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);
        if (!classNames && !className) return elements;

        var nodes = $(element).getElementsByTagName('*');
        className = ' ' + className + ' ';

        for (var i = 0, child, cn; child = nodes[i]; i++) {
            if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||
                (classNames && classNames.all(function(name) {
                    return !name.toString().blank() && cn.include(' ' + name + ' ');
                }))))
                elements.push(Element.extend(child));
        }
        return elements;
    };

    return function(className, parentElement) {
        return $(parentElement || document.body).getElementsByClassName(className);
    };
}(Element.Methods);

/*--------------------------------------------------------------------------*/

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
    initialize: function(element) {
        this.element = $(element);
    },

    _each: function(iterator, context) {
        this.element.className.split(/\s+/).select(function(name) {
            return name.length > 0;
        })._each(iterator, context);
    },

    set: function(className) {
        this.element.className = className;
    },

    add: function(classNameToAdd) {
        if (this.include(classNameToAdd)) return;
        this.set($A(this).concat(classNameToAdd).join(' '));
    },

    remove: function(classNameToRemove) {
        if (!this.include(classNameToRemove)) return;
        this.set($A(this).without(classNameToRemove).join(' '));
    },

    toString: function() {
        return $A(this).join(' ');
    }
};

Object.extend(Element.ClassNames.prototype, Enumerable);

/*--------------------------------------------------------------------------*/

(function() {
    window.Selector = Class.create({
        initialize: function(expression) {
            this.expression = expression.strip();
        },

        findElements: function(rootElement) {
            return Prototype.Selector.select(this.expression, rootElement);
        },

        match: function(element) {
            return Prototype.Selector.match(element, this.expression);
        },

        toString: function() {
            return this.expression;
        },

        inspect: function() {
            return "#<Selector: " + this.expression + ">";
        }
    });

    Object.extend(Selector, {
        matchElements: function(elements, expression) {
            var match = Prototype.Selector.match,
                results = [];

            for (var i = 0, length = elements.length; i < length; i++) {
                var element = elements[i];
                if (match(element, expression)) {
                    results.push(Element.extend(element));
                }
            }
            return results;
        },

        findElement: function(elements, expression, index) {
            index = index || 0;
            var matchIndex = 0, element;
            for (var i = 0, length = elements.length; i < length; i++) {
                element = elements[i];
                if (Prototype.Selector.match(element, expression) && index === matchIndex++) {
                    return Element.extend(element);
                }
            }
        },

        findChildElements: function(element, expressions) {
            var selector = expressions.toArray().join(', ');
            return Prototype.Selector.select(selector, element || document);
        }
    });
})();