<!DOCTYPE html>
<html>
<head>
<script>
function expStr(s, n)
{
for (var i = 0; i < n; ++i)
s += s;
return s;
}
function boom()
{
var s = document.getElementById("s")
var t = document.createTextNode(expStr("x ", 15));
s.appendChild(t);
document.documentElement.offsetHeight;
s.removeChild(t);
}
</script>
</head>
<body onload="boom();"><div style="width: 1px"><span id="s"></span></div></body>
</html>