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Test Info:

<!DOCTYPE html>
<html>
<head>
<script type="text/javascript">
function boom()
{
var table = document.createElement('table');
document.body.appendChild(table);
var colgroup = document.createElement('colgroup');
table.appendChild(colgroup);
var col = document.createElement('col');
colgroup.appendChild(col);
}
</script>
</head>
<body onload="boom();"></body>
</html>