<html>
<head>
<style>
#fl:first-line { }
</style>
<script>
function boom()
{
document.getElementById("s").style.overflow = "auto";
}
</script>
</head>
<body onload="boom();">
<div id="fl">
<b><span id="s">Foo</a></b>
</div>
</body>
</html>