$(function(){
	var div = $('div.sc_menu'), ul = $('ul.sc_menu'), ulPadding = 0;
	var divWidth = div.width(); div.css({overflow: 'hidden'});
	var lastLi = ul.find('li:last-child');
	div.mousemove(function(e){
		var ulWidth = lastLi[0].offsetLeft + lastLi.outerWidth() + ulPadding;	
		var left = (e.pageX - div.offset().left) * (ulWidth-divWidth) / divWidth;
		div.scrollLeft(left);
	});
});