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<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Cross frame drag and drop: helper file</title>
<style type="text/css">
div
{width:0;
height:0;
border:solid 50px silver;
border-radius:50px;
margin-left:auto;}
</style>
<script type="application/ecmascript">
var step = 1;
function enterPage(event)
{event.preventDefault();
if(step++ > 0)
{setColor('green silver silver silver');}
else
{step = 0;
setColor('maroon');
say('Dragenter should fire before dragover and drop');}
}
function overPage(event)
{event.preventDefault();
if(step++ > 1)
{setColor('green green silver silver');}
else
{step = 0;
setColor('maroon');
say('Dragover should fire after dragenter');}
}
function dropIt(event)
{if(step++ > 1)
{setColor('green');}
else
{step = 0;
setColor('maroon');
say('Dragover should fire after dragenter');}
}
function say(it)
{document.querySelector('pre').appendChild(document.createTextNode(it + '\n'))}
function setColor(c)
{document.querySelector('div').setAttribute('style','border-color:' + c)}
</script>
</head>
<body ondragenter="enterPage(event)" ondragover="overPage(event)" ondrop="dropIt(event)">
<div/>
<pre/>
</body>
</html>
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