<html class="reftest-wait"> <head> <title>Crash testcase</title> <script> function foo() { document.body.appendChild(document.createElement('frameset')); setTimeout(bar, 30); } function bar() { document.body.style.display = '-moz-groupbox'; document.documentElement.removeAttribute("class"); } </script> </head> <body onload="setTimeout(foo, 30);"> </body> </html>