a.ui-scrolltop:link,a.ui-scrolltop:active,a.ui-scrolltop:visited{display:block;height:60px;width:60px;text-indent:-999999px;overflow:hidden;background:#000 url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEMAAAANAgMAAACP9jv8AAAACVBMVEX///////8AAACO9MPsAAAAAXRSTlMAQObYZgAAAGhJREFUeF49zsEJwCAMBdBvoRfvWaJTOEIPZp+O4lEyZcn/RIl+SMJDAG2gTlfc7+k8H8Pm6cRiuFfjip3RphXUV4ghJIaQjVZQoCfkLDI7C7kgiAuRDK+YvJwLQnBPhovRw7ER5of3DyPbFp8RB9axAAAAAElFTkSuQmCC) 18px 21px no-repeat;*background-image:url(images/backtop.png);opacity:.5;filter:alpha(opacity = 50);cursor:pointer;}a.ui-scrolltop:hover{opacity:1;filter:alpha(opacity = 100);}