<!doctype html public "-//w3c//dtd html 3.2//en">
<html>
<head>
<title>testcase</title>
<script>
function doit()
{
var doc = window.document;
var t1 = doc.getElementById('table1');
var tb = doc.createElement('tfoot');
var tr = doc.createElement('tr');
tb.appendChild(tr);
t1.appendChild(tb);
var tb = doc.createElement('tfoot');
var tr = doc.createElement('tr');
tb.appendChild(tr);
t1.appendChild(tb);
var tb = doc.createElement('tfoot');
var td = doc.createElement('td');
tr.appendChild(td);
tb.appendChild(tr);
t1.insertBefore(tb, doc.getElementById("colg1"));
tr.parentNode.removeChild(tr);
}
</script>
</head>
<body onload="doit()">
<table id="table1"><tbody id="tbody1"><tr id="tr1"><td id="td1">x</td></tr></tbody><colgroup id ="colg1"></table>
</body>
</html>