<!DOCTYPE html> <html class="reftest-wait"> <body> <table id="thetable" width="150" style="top: -100px; position: relative;"> <tbody id="thebody"> <tr> <td>Hello</td> </tr> </tbody> </table> <script> function doTest() { document.getElementById("thetable").style.top="0px"; document.documentElement.className = ""; } document.addEventListener("MozReftestInvalidate", doTest, false); </script> </body> </html>