#scrolltop{display: block;width:60px;height: 142px;overflow: hidden;cursor: pointer;position: fixed;left:50%; margin-left:610px; bottom:130px;  _position:absolute;_bottom:151px;_top:expression(eval(parseInt(document.documentElement.scrollTop)+844)); overflow:visible;z-index:999;}
#scrolltop:hover{ background-position:0 -50px;}
#scrolltop .icoMa,#scrolltop .top{ display:block; height:50px; margin:10px 0 0 0; background:url(http://s.u.360.cn/template/mgame/images/scrolltop.png) no-repeat; cursor:pointer;}
#scrolltop .icoMa{ background-position:right top;}
#scrolltop .cur{ background-position:right bottom;}
#scrolltop .top{ background-position:left top; display:none; text-indent:-10000px;}
#scrolltop .top:hover,#scrolltop .curtop{ background-position:left bottom;}
#scrolltop .icoMa .Pma{ display:none;position:absolute; right:60px; bottom:-50px}
#scrolltop .cur .Pma{ display:block;}