ul.thumb {float: left;list-style: none;margin: 0; width: 252px;background-color: white; padding-bottom: 10px;} 
ul.thumb li {margin: 0 0; padding: 5px 5px;float: left;position: relative;width: 115px;height: 144px;}
ul.thumb li img {width: 115px; height: 134px;border: 1px #ddd solid;padding: 5px 5px;background: #f0f0f0;position: absolute;left: 0; top: 0;; clip:  rect(   )-ms-interpolation-mode: bicubic; }
ul.thumb li img.hover {margin-top:15px;background:url(thumb_bg.png) no-repeat center center;border: none;}