<!DOCTYPE html>
<html>
<head>
<script>
function boom()
{
document.documentElement.offsetHeight;
document.getElementById("x").style.counterIncrement = "a";
document.documentElement.offsetHeight;
}
</script>
<body onload="boom();" style="-moz-column-count: 3">
<div style="position: relative;">
<div style="position: absolute; height: 3pt;"></div>
<div style="position: absolute;" id="x"></div>
<div style="position: absolute; height: 8pt;"></div>
</div>
</body>
</html>