<html xmlns="http://www.w3.org/1999/xhtml" xmlns:xul="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" class="reftest-wait"> <head> <script> function boom() { var y = document.getElementById("y"); y.parentNode.removeChild(y); document.documentElement.removeAttribute("class"); } </script> </head> <body onload="setTimeout(boom, 30);"> <div style="float: left">X<xul:hbox><input type="radio"/></xul:hbox></div> <div id="y" style="float: left">Y</div> </body> </html>