<!DOCTYPE html> <html class="reftest-wait"> <head> <script> function doTest() { var div = document.createElement('div'); div.setAttribute("style", "position: absolute; left: 20px; top: 20px; background: black; height: 20px; width: 20px"); document.getElementById("t").appendChild(div); document.documentElement.className = ""; } window.addEventListener("MozReftestInvalidate", doTest, false); </script> </head> <body> <table style="position: absolute; top: 100px; left: 100px;"> <tr> <td id="t"> </td> </tr> </body> </html>