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Test Info:

<head>
<script>
function boom()
{
var zz = document.getElementById("d").childNodes[0];
zz.parentNode.removeChild(zz);
var r = document.createRange();
r.setStart(zz, 0);
r.setEnd(zz, 0);
try {
r.insertNode(document.createTextNode('5'));
} catch (e) {
}
}
</script>
</head>
<body onload="boom()">
<div id="d">3</div>
</body>
</html>