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Test Info:

<html>
<head>
<script>
function boom()
{
var a = document.documentElement;
var b = document.createElementNS("http://www.w3.org/1999/xhtml", "body");
b.setAttributeNS(null, "style", "column-width: 20em;");
a.innerHTML = "<frameset>";
b.innerHTML = "<dd><marquee>x";
document.removeChild(a);
document.appendChild(b);
}
</script>
</head>
<body onload="boom();"></body>
</html>