script.js

/**
 * Created by Aloma on 10/18/2016.
 */
function getXMLHTTPRequest()
{
    var request;

    // Lets try using ActiveX to instantiate the XMLHttpRequest object
    try{
        request = new ActiveXObject("Microsoft.XMLHTTP");
    }catch(ex1){
        try{
            request = new ActiveXObject("Msxml2.XMLHTTP");
        }catch(ex2){
            request = null;
        }
    }
    // If the previous didn't work, lets check if the browser natively support XMLHttpRequest
    if(!request && typeof XMLHttpRequest != "undefined"){
        //The browser does, so lets instantiate the object
        request = new XMLHttpRequest();
    }
    return request;
}
function loadURL(filename, callback)
{
    var aXMLHttpRequest = getXMLHTTPRequest();
    var allData;
    if (aXMLHttpRequest)
    {
        aXMLHttpRequest.open("GET", filename, true);

        aXMLHttpRequest.onreadystatechange = function (aEvt) {
            if(aXMLHttpRequest.readyState == 4){
                allData = aXMLHttpRequest.responseText;
                if(allData === "noauth"){
                    alert("Your session has expired. Relogin to continue.")
                    window.location.reload();
                }
                callback(allData)
            }
        };
        aXMLHttpRequest.send(null);
    }
    else
    {
        alert("A problem occurred instantiating the XMLHttpRequest object.");
    }
}