ul.thumb {
	float: left;
	list-style: none;
	padding: 10px;
	width: 930px;
	margin-top: -25px;
	margin-right: 40px;
	margin-bottom: 10px;
	margin-left: 40px;
}
ul.thumb li {
	padding: 5px;
	float: left;
	position: relative;
	width: 250px;
	height: 200px;
	margin-top: 20;
	margin-right: 20px;
	margin-bottom: 0;
	margin-left: 0;
}
ul.thumb li img {width: 250px; height: 200px;border:none;padding: 5px;position: absolute;left: 0; top: 0;-ms-interpolation-mode: bicubic; }
ul.thumb li img.hover {margin-top:15px;background:url(../images/thumb_bg.png) no-repeat center center;border: none;}