#scroller_cont {
    height: 90px;
    width: 160px;
    overflow: hidden;
    position: relative;
}
#scroller_cont ul {
    list-style: none;
    padding: 0;
    margin: 0;
    position: absolute;
}
#scroller_cont ul li {
    padding: 0;
    margin: 0;
}
#scroll_down {
    position: absolute;
    z-index: 100;
}
#scroll_up {
    position: absolute;
    z-index: 100;
}