#thumbnail {
    position: relative; /* important */
    overflow: hidden; /* important */
    width: 450px; /* important */
    height: 177px; /* important */
    /*margin: 0 199px;*/
    background: #000;
}

#thumbnail_frame {position: relative}
#thumbnail_previous {/*float: left;*/
position:absolute;
left:0!important;
left:-50%;
top:0;
}
#thumbnail_next {/*float: right;*/
position:absolute;
right:0;
top:0;
}
#thumbnail_content {
    position: absolute;
    top: 0;
    margin-left: 15px;
}

#thumbnail_content
#thumbnail_content li {
	width: 600px;
    list-style: none;
    margin: 0;
    padding: 0;
}
    #thumbnail_content {
        width: 6000px;
    }
    #container_bd #thumbnail ul li {
        display: block;
        float: left;
        margin: 5px;
        padding: 5px;
        border: 1px solid #666;
        background-color: #000;
    }

#container_bd #thumbnail ul li img {
    display: block;
}