#pdtotop{position:fixed;bottom:100px;right:10px;z-index:999;width:auto;cursor:pointer;display:none}*html #pdtotop{position:absolute;cursor:pointer;right:10px;display:none;top:expression(eval(document.documentElement.scrollTop+document.documentElement.clientHeight)-112+"px")}#pdtotop a {
    display: block;
    width: 50px;
    height: 20px;
    background: url('../webimages/top.gif') no-repeat;
    text-align: center;
    color: #888;
}