<html> <head> <script> function init2() { var one = document.getElementById('one'); var four = document.getElementById('two'); document.getElementsByTagName('table')[0].appendChild(one); setTimeout('clickit()', 0); } function doe(){ two.parentNode.removeChild(two); } function clickit() { var evt = document.createEvent("MouseEvents"); evt.initMouseEvent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null); document.body.dispatchEvent(evt); } window.addEventListener("load", init2, 0); window.addEventListener("click", doe, 0); </script> </head> <body> <table style="border-collapse: collapse;"> <tbody> <tr><td rowspan="2">r11</td></tr> <tr id="one"><td id="two">r21</td></tr> <tr></tr> </tbody> </table> Mozilla should not crash when clicking in the document </body> </html>