michael@0: <window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
michael@0:         xmlns:html="http://www.w3.org/1999/xhtml"
michael@0:         xmlns:math="http://www.w3.org/1998/Math/MathML"
michael@0:         class="reftest-wait"
michael@0:         onload="boom();">
michael@0:         
michael@0: <html:style type="text/css">
michael@0: [class="mp"] { display: -moz-popup; }
michael@0: </html:style>
michael@0: 
michael@0: <script>
michael@0: 
michael@0: function boom()
michael@0: {
michael@0:   document.getElementById("mtd").setAttribute("class", "mp");
michael@0:   setTimeout(boom2, 30);
michael@0: }
michael@0: 
michael@0: function boom2()
michael@0: {
michael@0:   document.getElementById("mtd").setAttribute("class", "");
michael@0:   document.documentElement.removeAttribute("class");
michael@0: }
michael@0: 
michael@0: </script>
michael@0: 
michael@0: <math:mtd id="mtd" />
michael@0: 
michael@0: </window>