379799-1.html
<!DOCTYPE html>
<html>
<head>
<style id="firstLetterSheet">
.fl:first-letter { color: red }
</style>
<script>
function boom()
{
document.getElementById("parent").className = "";
document.body.offsetWidth;
document.getElementById("test").style.position = "relative";
}
</script>
</head>
<body onload="boom()">
<div class="fl" id="parent" style="color: green">
Foo <span id="test">Bar</span>
</div>
</body>
</html>
