#slideshow {
    position: relative;
    height: 350px;
    width: 540px;
    margin: 0 auto;
}

#slideshow img {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 8;
    opacity: 0.0;
}

#slideshow img.active {
    z-index: 10;
    opacity: 1.0;
}

#slideshow img.last-active {
    z-index: 9;
}