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Test Info:

<html class="reftest-wait">
<head>
<script>
function boom()
{
document.body.offsetHeight;
var ninediv = document.getElementById("nine");
var parent = ninediv.parentNode;
for (var i = 4; i <= 8; i++) {
var newdiv = document.createElement("div");
newdiv.appendChild(document.createTextNode(i));
parent.insertBefore(newdiv, ninediv);
}
for (var i = 13; i <= 15; i++) {
var newdiv = document.createElement("div");
newdiv.appendChild(document.createTextNode(i));
parent.appendChild(newdiv);
}
document.body.offsetHeight;
document.documentElement.className = "";
}
</script>
</head>
<body onload="boom();">
<div>1</div>
<div>2</div>
<div>3</div>
<div id="nine">9</div>
<div>10</div>
<div>11</div>
<div>12</div>
</body>
</html>