img{border:none}
.container{height:360px;width:910px;top:50%;left:50%;position:absolute;margin:-180px 0 0 -450px}
ul.thumb{float:left;list-style:none!important;width:720px;position:absolute;left:20px;margin:0;padding:10px}
ul.thumb li{position:relative;float:left;width:315px;height:205px;background:transparent;margin:0;padding:5px}
ul.thumb li img{width:315px;height:175px;border:1px solid #ddd;background:#f0f0f0;position:absolute;left:0;top:0;-ms-interpolation-mode:bicubic;padding:5px}
ul.thumb li img.hover{background:url(thumb_bg.png) no-repeat center center;border:none}