#backTop { opacity: 0.9;filter: alpha(opacity=90);position: fixed; _position:absolute; z-index:9999; bottom:0; right:0; display:none; height: 258px;width: 172px;background: url("img.png"); cursor:pointer}
#backTop a { display:block; overflow:hidden}
#backTop:hover {opacity: 1;filter: alpha(opacity=100)}
#scrolltop {display:none!important}