1function getDocHeight() {	// $(document).height() value depends on browser
2    var D = document;
3    return Math.max(
4        D.body.scrollHeight, D.documentElement.scrollHeight,
5        D.body.offsetHeight, D.documentElement.offsetHeight,
6        D.body.clientHeight, D.documentElement.clientHeight
7    );
8}
9$(window).scroll(function() {
10       if($(window).scrollTop() + $(window).height() == getDocHeight()) {
11           alert("bottom!");
12       }
13});