$(document).ready(function(){
  $("#juhaoyong_xuanfukefubut").mouseenter(function(){
    $("#juhaoyong_xuanfukefucontent").css("display","block");
	$("#juhaoyong_xuanfukefubut").css("display","none");
  });
  $("#juhaoyong_xuanfukefucontent").mouseleave(function(){
    $("#juhaoyong_xuanfukefucontent").css("display","none");
	$("#juhaoyong_xuanfukefubut").css("display","block");
  });
});

juhaoyongkefu=function(id,_top,_left){
	var me=id.charat?document.getelementbyid(id):id,d1=document.body,d2=document.documentelement;
	me.style.top=_top?_top+'px':0;
	me.style.left=_left+"px";
	me.style.position='absolute';
	var juhaoyongkftop=setinterval(function(){me.style.top=parseint(me.style.top)+(math.max(d1.scrolltop,d2.scrolltop)+_top-parseint(me.style.top))*0.1+'px'},10+parseint(math.random()*20));
	clearinterval(juhaoyongkftop);
	juhaoyongkftop=setinterval(function(){me.style.top=parseint(me.style.top)+(math.max(d1.scrolltop,d2.scrolltop)+_top-parseint(me.style.top))*0.1+'px'},10+parseint(math.random()*20));
	return arguments.callee;
}
juhaoyongkefu('juhaoyong_xuanfukefu',175,0);