.back-to-top {
    position: fixed;
    display: none;
    right: 30px;
    bottom: 30px;
    z-index: 99;
}


    /*.scrollup{
    width:40px;
    height:40px;*/
    /*opacity:0.3;*/
    /*position:fixed;
    bottom:50px;
    right:50px;
    display:none;
    text-indent:-9999px;
    z-index:9;
    background: url('icon_top2.png') no-repeat;
}*/