Drag 'n' Drop with change Option

Description:

This callback function is called when a drag is in progress. This is the preferred callback for drag event.

Syntax:

new Draggable('element', {change: 'effectFunction'});

Here effectFunction is function which defines effect to be applied.

Example:

<html>
<head>
<title>Draggables Elements</title>
<script type="text/javascript" 
        src="/javascript/prototype.js"></script>
<script type="text/javascript"
        src="/javascript/scriptaculous.js"></script>

<script type="text/javascript">

window.onload = function(){
   new Draggable('myimage', 
                { change : function(){
		           new Effect.Opacity('myimage', 
	                   {from:0, to:1.0, duration:1});}

                });
}

</script>

</head>
<body>

<p>While you drag this image it become disappear.</p>

<img id="myimage" src="/images/scriptaculous.gif"/>

</body>

To understand it in better way you can Try it yourself.