/***************************************************************************************************************************************
* 2009-04-23 ½ÉÁø¿µ
* ½ºÅ©·Ñ À̺¥Æ® ¹ß»ý ½Ã Äü¸Þ´º À̵¿ÇÏ´Â jQueryÇÔ¼ö
/***************************************************************************************************************************************/
var lastScrollY = 0;

$(function(){

	var diffY = Math.max(document.documentElement.scrollTop, document.body.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($("#quickTop").offset().top) + percent;

			lastScrollY = lastScrollY + percent;
		}

		$("#quickTop").stop();
		$("#quickTop").animate({"top": diffTop}, 400);
	});
});