#toTop {
    display: none;
    position: fixed;
    bottom: 5px;
    right: 5px;
    width: 42px;
    height: 42px;
    z-index: 98;
    background-image: url('../../images/ZH-TW/gotop.png');
    background-repeat: no-repeat;
    background-size: contain;
    opacity: 0.95;
    filter: alpha(opacity=95); /* For IE8 and earlier */
}

    #toTop:hover {
        opacity: 1;
        filter: alpha(opacity=100); /* For IE8 and earlier */
    }