<!DOCTYPE html>
<html>
<head>
<script>
function performTest()
{
    var u = document.getElementsByTagName("U")[0];
    var range = new Range(u,0,u,0);
    Formatting_splitAroundSelection(range);
    showRangeAsBrackets(range);
}
</script>
</head>
<body><p>One <b>Two <u>Three<br>Four<br>Five</u> Six</b> Seven</p></body>
</html>