#slideshow {
    position:relative;
    margin-left: auto;
    margin-right: auto;
    width:720px;
    height:300px;
    background-color: #fff;
}
 
#slideshow IMG {
    position:absolute;
    margin: auto;
    xtop:0;
    xleft:0;
    z-index:8;
    opacity:0.0;
}
 
#slideshow IMG.active {
    z-index:10;
    opacity:1.0;
}
 
#slideshow IMG.last-active {
    z-index:9;
}