Execute code after onbeforeunload modal

Do you want to execute some JS code after the visitor clicks on 'Stay on this page' button in a onbeforeunload modal?

I found a really nice hack to do so. It pushes the code in the next UI cycle using setTimeout which gets executed as soon as the modal closes and execution resumes:

$(function() {
$(window).bind('beforeunload', function() {
    setTimeout(function() {
        setTimeout(function() {
            $(document.body).css('background-color', 'red');
        }, 1000);
    },1);
    return 'are you sure';
});
}); ​

Watch it live here.

Source: http://stackoverflow.com/a/4651049/891962