window.onunload = function() is not working in Chrome

[Kalana]

I need to fire an ajax function inside the window.onunload = function(). but its not working inside the chrome browser only.. Its working on IE & Firefox. In the Chrome browser even an alert inside the window.onunload = function() will not get executed. How can I execute this one in Chrome. Is there any other way we can do it? (can't use the window.onbefore unload = function()also)

[gits]

have a look here for a discussion regarding webkits unload/pagehide events