Change div css when user scrolls past it, using jQuery

Question

When a user scrolls past a div I need it\'s css changed to position:fixed. Much like what is done here: http://imakewebthings.com/jquery-waypoints/shortcuts/sticky-elements/

Answer 1

This is what finally worked for me:

    jQuery(document).ready(function() {
    var topOfrel = jQuery("#this").offset().top;
    var topOffooter = jQuery("#footer").offset().top - jQuery(window).height(); 
    var topOffootero = topOffooter ;
    var boxheight = jQuery(window).height() - 130;//adjusting for position below
    jQuery(window).scroll(function() {
        var topOfWindow = jQuery(window).scrollTop();
        if (topOfrel < topOfWindow && topOffooter > topOfWindow) {
            jQuery("#this").css("position", "fixed").css("top", "130px").css("overflow","auto").css("height", boxheight + "px");

        } else {
            jQuery("#this").css("position", "static");
        }
    });
});