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<?xml version="1.0" encoding="utf-8"?>
<head>
<title>Link drag and drop: setting dropzone attribute ondragstart</title>
<style type="text/css">
div
{display:inline-block;
vertical-align:top;
background-color:olive;
color:white;
padding:20px;
width:100px;
height:100px;}
div:nth-child(2)
{background-color:green;}
div:nth-child(3)
{background-color:teal;}
</style>
<script type="application/ecmascript">
var effects = ['copy','move','link'];
function dropSelection(event,element)
{document.querySelectorAll('div')[element].appendChild(document.createTextNode((event.dataTransfer.dropEffect == effects[element])?' PASS ':' FAIL '));}
function start(event)
{for(var i = 0; i != 3; i++)
{document.querySelectorAll('div')[i].setAttribute('dropzone',effects[i] + ' string:text/uri-list')}
}
</script>
</head>
<body>
<div ondrop="dropSelection(event,0)"/>
<div ondrop="dropSelection(event,1)"/>
<div ondrop="dropSelection(event,2)"/>
<p ondragstart="start(event)"><a href="data:text/plain,1" ondragstart="start(event)">Drag me</a></p>
<p>You should be able to drag link and drop it onto any of the green boxes.</p>
</body>
</html>