Why is jQuery unload not working in chrome and safari?

Question

unload function in jQuery works fine in Firefox but not in chrome and safari. please check this fiddle in chrome and Firefox. http://jsfiddle.net/jeevankk/Gywnw/2/ . Alerts

Answer 1

This is because the unload event is not part of any standard

https://developer.mozilla.org/en/DOM/window.onunload

check the bottom of the page i just linked to.