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Test Info:

<html>
<head>
<script>
function boom()
{
document.getElementById("ce").contentEditable = true;
document.documentElement.offsetHeight;
document.getElementById("finput").setAttribute("type", "");
}
</script>
</head>
<body onload="boom();">
<input id="finput" type="file" disabled>
<span id="ce"></span>
</body>
</html>