ul.slideshow
{
    position: relative;
    height: 220px;
}
ul.slideshow li
{
    position: absolute;
    top: 0px;
    left: 0px;
    margin: 0;
    visibility: hidden;
}
ul.slideshow li.current
{
    visibility: visible;
}
ul.slideshow img
{
    display: block;
}