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Test Info:

<!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>