var lastScrollY = 0;
$(function(){
 var diffY = document.documentElement.scrollTop;
 $(window).scroll(function(){
	var diffTop = Math.max(document.documentElement.scrollTop, document.body.scrollTop);

	if (diffY != lastScrollY) {
	 percent = .10 * (diffY - lastScrollY);
	 if (percent > 0) {
		percent = Math.ceil(percent);
	 } else {
		percent = Math.floor(percent);
	 } 

	 diffTop = parseInt($("#quick").offset().top) + percent;

	 lastScrollY = lastScrollY + percent;
	}

	$("#quick").stop();
	$("#quick").animate({"top": diffTop}, 600);
 });
});