<p>This test for a bug copy/pasting underlined text.</p>
<div id="copy" contenteditable="true">This should be underlined.</div>
<div id="paste" contenteditable="true"><br></div>

<script>
var copy = document.getElementById("copy");
copy.focus();
document.execCommand("SelectAll");
document.execCommand("Underline");
document.execCommand("Copy");
var paste = document.getElementById("paste");
paste.focus();
document.execCommand("Paste");
</script>