text: <html class="reftest-wait">
  <head>
  <style>
  
      #colset {
        width: 300pt;
        height: 2in;
        column-count: 3;
      }
      
      .container {
        height: 1in;
      }
  
      .b6 {
        height: 10in;
      }
      
      .c3 {
        position: absolute;
      }
  
      .c4 {
        height: 3in;
      }
  
  </style>
  
  <script>
  
  function boom()
  {
    document.getElementById("x").setAttribute("class", "c4");
    setTimeout(boom2, 10);
  }
  
  function boom2()
  {
    document.getElementById("x").setAttribute("class", "");
    setTimeout(boom3, 10);
  }
  
  function boom3()
  {
    document.documentElement.removeAttribute("class");
  }
  
  </script>
  </head>
  
  <body onload="boom();">
  
  <div id="colset">
    <div id="x"></div>
    <div class="container">
      <div class="b6"></div>
      <div>
        <div class="c3"></div>
      </div>
    </div>
  </div>
  
  </body>
  </html>
  