#rightAdHolder{
    position: relative;
}
#rightAdBox{
    height: 80px;
    width: 237px;
    overflow: hidden;
}

#rightAdBox:hover #rightAdContent{
    position: absolute;
    left:-250px;
    border: 10px solid silver;
    -moz-box-shadow: -5px 5px 5px #888;
    -webkit-box-shadow: -5px 5px 5px #888;
    box-shadow: -5px 5px 5px #888;
}
#rightAdContent{

    height: 340px;
    width: 474px;
    z-index: 100;
    overflow: hidden;
}