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Test Info:

<!DOCTYPE html>
<html>
<head>
<script>
function boom()
{
var a = document.createElementNS("http://www.w3.org/1999/xhtml", "fieldset");
var b = document.createElementNS("http://www.w3.org/1999/xhtml", "legend");
var c = document.createElementNS("http://www.w3.org/1999/xhtml", "input");
a.appendChild(b);
a.appendChild(c);
a.removeChild(b);
c.expandoQ = a;
}
</script>
</head>
<body onload="boom();"></body>
</html>