*html .advbox{position:absolute;top:expression(eval(document.documentElement.scrollTop));}
.advbox{width:650px;position:fixed;display:none;left:50%;top:0;margin:-215px 0 0 -325px;}
.advbox .advpic{position:relative;height:553px;overflow:hidden;}
.advbox .advpic .closebtn{display:block;width:60px;height:22px;line-height:26px;font-size:12px;color:#fff;text-indent:12px;overflow:hidden;position:absolute;right:0px;top:20px;z-index:99;}