#toTop {
    display: none;
    position: fixed;
    bottom: 15px;
    right: 10px;
    width: 64px;
    height: 64px;
    background-image: url('../../img/public/up.png');
    background-repeat: no-repeat;
    opacity: 0.6;
    filter: alpha(opacity=60); /* For IE8 and earlier */
    z-index: 1000;
}
#toTop:hover {
    opacity: 0.9;
    filter: alpha(opacity=90); /* For IE8 and earlier */
    z-index: 1000;
}