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Test Info:

<html>
<head>
<script>
function boom()
{
var frameset = document.getElementsByTagName("frameset")[0]
var oldFrame = frameset.firstChild;
var newFrame = document.createElementNS("http://www.w3.org/1999/xhtml", "frame");
frameset.appendChild(newFrame);
frameset.removeChild(oldFrame);
}
</script>
</head>
<frameset onload="boom()"><frame></frame></frameset>
</html>