<html class="reftest-wait"> <head> <style> #colset { width: 300pt; height: 2in; -moz-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>