#goTopBtn {
	POSITION: fixed; TEXT-ALIGN: center; LINE-HEIGHT: 30px; WIDTH: 50px; BOTTOM:100px; HEIGHT: 50px; FONT-SIZE: 12px; CURSOR: pointer; RIGHT: 50px;  _POSITION: absolute; 
    _TOP: expression(documentElement.scrollTop+documentElement.clientHeight-this.clientHeight); 
}