div.gallerySlideshow ul {
    position: relative;
    display: block;
    margin: 0px;
    padding: 0px;
    width: 600px;
    height: 400px;
    overflow: hidden;
}

div.gallerySlideshow ul li {
    position: absolute;
    display: block;
    list-style-type: none;
    margin: 0px;
    padding: 0px;
    background-color: #FFFFFF;
}

div.gallerySlideshow ul li img {
    display: block;
    background-color: #FFFFFF;
}