#toTop {
    display: none;
    text-decoration: none;
    position: fixed;
    bottom: 20px;
    right: 20px;
    overflow: hidden;
    width: 40px;
    height: 40px;
    border: none;
    text-indent: -999px;
    background: url(../images/ui.totop.png) no-repeat left top;
    z-index: 999;
}

#toTopHover {
    background: url(../images/ui.totop.png) no-repeat left -40px;
    width: 40px;
    height: 40px;
    display: block;
    overflow: hidden;
    float: left;
    opacity: 0;
}