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<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Drag and drop of overlapping images: fixed position</title>
<style type="text/css">
span, strong
{color:green;
background-color:yellow;}
strong
{color:red;}
div
{height:100px;
position:relative;}
img
{display:block;
position:fixed;
top:0;
bottom:0;
width:100px;
height:100px;}
</style>
<script type="application/ecmascript">
function start(event,feedback)
{event.dataTransfer.effectAllowed = 'copy';
event.dataTransfer.addElement(document.querySelector(feedback));}
</script>
</head>
<body>
<div>
<img ondragstart="start(event,'strong')" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP4z8DwHwAFAAH/VscvDQAAAABJRU5ErkJggg=="/>
<img ondragstart="start(event,'span')" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNgaGD4DwAChAGAJVtEDQAAAABJRU5ErkJggg=="/>
</div>
<p>Try to drag box above. You should see word <span>PASS</span> not <strong>FAIL</strong> in feedback overlay all the time.</p>
</body>
</html>
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