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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<head>
<script>
function finishTest()
{
document.documentElement.className = "";
}
function boom()
{
var HTML_NS = "http://www.w3.org/1999/xhtml";
var clonedRichListBox = document.createElementNS(XUL_NS, 'richlistbox').cloneNode(false);
var div = document.createElementNS(HTML_NS, "div");
div.appendChild(clonedRichListBox);
document.body.appendChild(clonedRichListBox);
setTimeout(finishTest, 100);
}
</script>
</head>
<body onload="setTimeout(boom, 100);" style="visibility: hidden">
</body>
</html>