#slideshow {
    position: relative;    
}

#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;
}