.scrollup {
    width: 40px;
    height: 40px;
    text-indent: -9999px;
    /*opacity:0.3;*/
    position: fixed;
    bottom: 0px;
    right: 0px;
    display: none;
    z-index: 1000;
    background: url("../images/icon_top_1.png");
    background-repeat: no-repeat;
}