.ad_area{
   /*: background-color: #e4cb3d;
    background-position: center center;
    background-image: url(img/ad_img.gif);
    background-repeat: no-repeat;*/
}

#header_ad{
    margin: 0px auto 0px auto;
    height: 90px;
    width: 728px;
}

#home_top_ad_box{
    height: 295px;
    width: 600px;
    float: right;
}

#sidebar_ad_box{
    width: 160px;
    height: 600px;
}