#roll_top,#fall,#ct{position:relative;cursor:pointer;height:72px;width:26px;}
#roll_top{background:url(/Skins/Default/Img/fh.png) no-repeat;}
#fall{background:url(/Skins/Default/Img/fh.png) no-repeat 0 -80px;}
#ct{background:url(/Skins/Default/Img/fh.png) no-repeat 0 -40px;}
#roll{display:block;width:15px;margin-right:-500px;position:fixed;right:50%;top:50%;_margin-right:-510px;_position:absolute;_margin-top:300px;_top:expression(eval(document.documentElement.scrollTop));}