fix div on scrolling at a certain point
jQuery
$(window).scroll(function(){ $("#fixed").css("top", Math.max(0, 100 - $(this).scrollTop())); });
CSS
#fixed { position: fixed; top: 100px; right: 0; z-index: 9999; }
$(window).scroll(function(){ $("#fixed").css("top", Math.max(0, 100 - $(this).scrollTop())); });
#fixed { position: fixed; top: 100px; right: 0; z-index: 9999; }