#slideshow {
    position:relative;
    height:250px;
}

#slideshow img {
    position:absolute;
    top:0;
    left:0;
    z-index: -3;
    opacity:0.0;
}

#slideshow img.active {
    z-index:-1;
    opacity:1.0;
}

#slideshow img.last-active {
    z-index:-2;
}