Capture event onclose browser

http://docs.jquery.com/Events/unload#fn

jQuery:

$(window).unload( function () { alert("Bye now!"); } );

or javascript:

window.onunload = function(){alert("Bye now!");}

Events onunload or onbeforeunload you can’t use directly – they do not differ between window close, page refresh, form submit, link click or url change.

The only working solution is How to capture the browser window close event?

Men, use this:

if(myWindow.closed){
    callback();
    return;
}