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<!doctype html>
<html lang="en">
<head>
<title>Datepicker Visual Test : Datepicker ticket #4071</title>
<link rel="stylesheet" href="../visual.css" type="text/css" />
<link rel="stylesheet" href="../../../themes/base/ui.all.css" type="text/css">
<script type="text/javascript" src="../../../jquery-1.4.1.js"></script>
<script type="text/javascript" src="../../../ui/jquery.ui.core.js"></script>
<script type="text/javascript" src="../../../ui/jquery.ui.widget.js"></script>
<script type="text/javascript" src="../../../ui/jquery.ui.datepicker.js"></script>
<script type="text/javascript">
function ValidatorHookupEvent(control, eventType, functionPrefix) {
var ev;
eval("ev = control." + eventType + ";");
if (typeof(ev) == "function") {
ev = ev.toString();
ev = ev.substring(ev.indexOf("{") + 1, ev.lastIndexOf("}"));
}
else {
ev = "";
}
var func;
if (navigator.appName.toLowerCase().indexOf('explorer') > -1) {
func = new Function(functionPrefix + " " + ev);
}
else {
func = new Function("event", functionPrefix + " " + ev);
}
eval("control." + eventType + " = func;");
}
function HandleChange(event, boundBy) {
var boundBy = boundBy ? boundBy : '$(control).change(function(event){...})';
var type = event.type,
srcOrTarget = event.srcElement ? 'srcElement' : 'target',
tagName = event[srcOrTarget].tagName;
alert('[' + boundBy + ']\nevent.type: ' + type + '\nevent.' + srcOrTarget + '.tagName: ' + tagName);
}
$(function() {
var control = $('#myInput')[0], eventType="onchange";
$(control).datepicker();
$(control).change(HandleChange);
$('#changeButton').click(function() {
$(control).change();
});
$('#triggerButton').click(function() {
$(control).trigger('change');
});
$('#triggerHandlerButton').click(function() {
$(control).triggerHandler('change');
});
$('#fireEventButton').click(function() {
control.fireEvent('onchange');
});
if (!control.fireEvent) { $('#fireEventButton').remove(); }
ValidatorHookupEvent(control, eventType, "HandleChange(event, 'eval(control.onchange = func)')");
});
</script>
<style type="text/css">
button { display: block; }
</style>
</head>
<body>
<h1 class="ui-widget-header"><a href="http://dev.jqueryui.com/ticket/4071">#4071 - 'length' is null or not an object</a></h1>
<h2>Summary</h2>
In Internet Explorer, when a event such as click on one element causes a change event on another element to trigger programmatically, any change event handler that was bound to that second element through onchange gets the click event instead of the change event.
<h2>Steps to reproduce</h2>
<p>
To demonstrate the issue, do one of the following:
</p>
<ul>
<li>Click the input to open the Datepicker, then select a date</li>
<li>Or press a number in the text field and blur</li>
<li>Or click a button below</li>
</ul>
<p>
Each will trigger change on the text input. The input has a handler bound in three different ways. Notice the difference when pressing a number in the input and bluring versus either selecting a date or pressing one of the first three buttons. In Internet Explorer, when the issue is present, 2 out of the three event objects are of type 'click' instead of 'change' and have the wrong corresponding srcElement/target when the datepicker or one of the first three buttons are clicked.
</p>
<input type="text" id="myInput" onchange="HandleChange(event, '<input onchange=\'...\' />')" />
<button id="changeButton">Click to trigger change event via $(control).change();</button>
<button id="triggerButton">Click to trigger change event via $(control).trigger('change');</button>
<button id="triggerHandlerButton">Click to trigger change event via $(control).triggerHandler('change');</button>
<button id="fireEventButton">Click to fire change event via control.fireEvent('onchange');</button>
</body>
</html>
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