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index.html
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<html>
<head>
<title>WM :: Validation for ezPayId</title>
</head>
<body>
<h1>This must be validated</h1>
<input type="text" id="ezPayId" maxlength="17" />
</body>
<script src="https://code.jquery.com/jquery-2.2.4.min.js" integrity="sha256-BbhdlvQf/xTY9gja0Dq3HiwQF8LaCRTXxZKRutelT44=" crossorigin="anonymous"></script>
<script type="text/javascript">
$(document).ready(function() {
validateEzPayId("#ezPayId");
});
function validateEzPayId(inputId) {
var ezPayIdlength = 15;
$(inputId).on("keypress", function(e) {
if( e.keyCode == 45 || ( e.keyCode >= 48 && e.keyCode <= 57 ) ){
return true;
}
else{
return false;
}
});
$(inputId).on("keyup", function() {
var val = $(this).val();
val = _formatEzPayId(_truncateExtra(_onlyNumber(val)));
$(this).val(val);
});
$(inputId).on("change", function() {
var val = $(this).val();
val = _onlyNumber(val);
if (_checkLength(val)) {
val = _prependZeros(val);
} else {
val = _truncateExtra(val);
}
val = _formatEzPayId(val);
$(this).val(val);
});
function _onlyNumber(str) {
var number = str.match(/\d/g) || [];
number = number.join("");
return number;
}
function _checkLength(str) {
return (str.length <= ezPayIdlength) ? true : false;
}
function _prependZeros(str) {
return (!!str.length) ? (new Array(ezPayIdlength - str.length + 1).join(0) + str) : "";
}
function _truncateExtra(str) {
match = str.match(/[\d]{0,15}/);
return match[0];
}
function _formatEzPayId(str) {
return str.substring(0, 5) +
((!!str.substring(5, 10)) ? ("-" + str.substring(5, 10)) : "") +
((!!str.substring(10, 15)) ? ("-" + str.substring(10, 15)) : "");
}
}
</script>
</html>