$(function(){
			var week;
			if(new Date().getDay()==0){week=" \u661f\u671f\u65e5";}
			if(new Date().getDay()==1){week=" \u661f\u671f\u4e00";}
			if(new Date().getDay()==2){week=" \u661f\u671f\u4e8c";}
			if(new Date().getDay()==3){week=" \u661f\u671f\u4e09";}
			if(new Date().getDay()==4){week=" \u661f\u671f\u56db";}
			if(new Date().getDay()==5){week=" \u661f\u671f\u4e94";}
			if(new Date().getDay()==6){week=" \u661f\u671f\u516d";}
			$(".sys-date").append(new Date().getFullYear()+"\u5e74"+(new Date().getMonth()+1)+"\u6708"+new Date().getDate()+"\u65e5"+week);
			$('li.mainlevel').mousemove(function(){
				$(this).find('ul').slideDown("1000");//you can give it a speed
			});
			$('li.mainlevel').mouseleave(function(){
				$(this).find('ul').slideUp("fast");
			});
		})