返回顶部黑科技

HTML：

<div id="top" style="margin-top: 30px; 1200px;height: 60px;background: #FFFFFF;cursor: pointer;">
     <div style="text-align: center;line-height: 60px;;font-size: 16px;color: #999999;">
         <img src="../../image/go_top.png" style="padding-right: 35px;" />
            返回顶部，立刻申请
         <img src="../../image/go_top.png" style="padding-left: 35px;" />
     </div>
</div>

JS:

$(function(){
   $("#top").click(function() {
       $("html,body").animate({scrollTop:0}, 500);
   });
});