Question

I want when a user closes the tab or window or when he tries to move to another location different from my site to pops a confirm box, and if he confirm to execute an ajax script and then to close or change the window. I don’t know how to do that. PS: I’m using jQuery.

Answer 1

$(window).unload(function() {
    var answer=confirm("Are you sure you want to leave?");
if(answer){
    //ajax call here
    }
});

Just add your own alert/dialogue code to the function.