#banner-ad div {
display:block;
width:240px;
height:392px;
}

#banner-ad {
position:relative;
width:240px;
height:392px;
}

#banner-ad div {
position:absolute;
top:0;
left:0;
z-index:8;
opacity:0.0;
}

#banner-ad div.active {
z-index:10;
opacity:1.0;
}

#banner-ad div.last-active {
z-index:9;
}