Jquery $(window).height() function does not return actual window height

Question

I have a page that I need to dynamically load ajax content when the user scrolls to the bottom. The problem is that JQuery is not returning the correct window height. I have

Answer 1

//works in chrome
$(window).bind('scroll', function(ev){

    //get the viewport height. i.e. this is the viewable browser window height
    var clientHeight = document.body.clientHeight,
        //height of the window/document. $(window).height() and $(document).height() also return this value.
        windowHeight = $(this).outerHeight(),
        //current top position of the window scroll. Seems this *only* works when bound inside of a scoll event.
        scrollY = $(this).scrollTop();

    if( windowHeight - clientHeight === scrollY ){
        console.log('bottom');
    }

});