ul#slider {
    width: 300px;
    height: 300px;
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
}

ul#slider li {
    float: left;
    position: relative;
    /*display: none;*/
}

ul#slider li div {
    position: absolute;
    width: 300px;
    background-color: #000;
    color: #fff;
    left: 0;
    /*display: none;*/
    padding: 10px;
}

.top {
    top: 0;
}

.bottom {
    bottom: 0;
}