.thumb {
float:left;
width:74px;
height:27px;
margin-left:70px;
margin-top:-12px;
_margin-top:-20px;
_margin-left:50px;

}
.thumb li {
float: left;
position: relative;
width: 74px;
height: 27px;
}
.thumb li img {
width: 74px;
 height:27px;
  position: absolute;
 left: 0; top: 0;
 -ms-interpolation-mode: bicubic; 
 }
.thumb li img.hover {
width:100px;
height:50px;
border: none;
}