<html xmlns="http://www.w3.org/1999/xhtml" 
      class="reftest-wait"  
      style="margin: 12em; padding: 20px 10em; opacity: 0.2; font-size: 11.2px; -moz-appearance: toolbar; white-space: nowrap;"><body 
      style="position: absolute;" 
      onload="setTimeout(function() { document.body.removeChild(document.getElementById('tr')); document.documentElement.removeAttribute('class'); }, 30);">

xxx
yyy

<tr id="tr">300</tr></body></html>