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<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Dropping image on vertical scrollbar of a scrollable block element</title>
<style type="text/css">
div[ondragenter]
{width:2em;
height:5em;
margin-top:1em;
font-size:1.5em;
overflow-y:scroll;}
p:first-child
{padding-left:1em;}
img
{width:5px;
height:5px;}
</style>
<script type="application/ecmascript">
function checkImage(event)
{document.querySelector('div').firstChild.nodeValue = (document.querySelector('img').getAttribute('src') == event.dataTransfer.getData('text/uri-list').replace(/\r\n$/,''))?'P A S S':'F A I L';}
</script>
</head>
<body>
<p><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAYAAABytg0kAAAAEElEQVR42mNgaGD4D8YwBgAw9AX9Y9zBwwAAAABJRU5ErkJggg==" alt="PNG green pixel" ondragstart="event.dataTransfer.effectAllowed = 'copy'"/></p>
<p>Drag little square above and drop it on scrollbar below. You should see word PASS when you drop it on scrollbar.</p>
<div ondragenter="event.preventDefault()" ondragover="return false" ondrop="checkImage(event)">→ → → → → → → → → → → → → → → → → → → →</div>
</body>
</html>
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