beforeunload doenst work correctly

[Jorik]

$(window).bind("beforeunload") and unbind() does not work correctly. The only way to use it now is good old javascript.

It now only works if you return false in the jquery way:

$(window).bind("beforeunload", function() { return false; })

but this shows the message 'false', and if you return a string the function doenst work anymore.

the way to let is work without jquery:

bind event window.onbeforeunload = function() {

return "Save your data!";

};

unbind the event window.onbeforeunload = null;

[serious]

This is a duplicate of #4106 which was re-opened by Brandon.