<!DOCTYPE html><html class="reftest-wait"><head><script type="text/javascript"> function boom() { var area = document.getElementById("area"); var main = document.getElementById("main"); area.nextSibling.data += " a "; document.documentElement.offsetHeight; area.nextSibling.data = " b "; main.previousSibling.data += " \u062A "; document.documentElement.removeAttribute("class"); } function boom0(ev) { setTimeout(boom, 0); } </script></head><body onload="boom0();"> <div id="main" style="width: 1px;"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAIAAACQd1PeAAAADElEQVR42mP4z8AAAAMBAQD3A0FDAAAAAElFTkSuQmCC" usemap="#Map"><map name="Map"><area id="area"> </map></div></body></html>