ul.thumb
{
    float: left;
    list-style: none;
    margin: 0;
    z-index: 1;
}
ul.thumb li
{
    text-align: center;
    display: block;
    width: 110px;
    list-style-type: none;
    margin: 0;
    position: relative; /* Set the absolute positioning base coordinate */ /*width: 110px;*/
    height: 75px;
    z-index: 2;
}
ul.thumb li img
{
    width: 100px;
    height: 100px; /* Set the small thumbnail size */
    -ms-interpolation-mode: bicubic; /* IE Fix for Bicubic Scaling */
    border: 1px solid #ddd;
    background: #f0f0f0;
    position: absolute;
    left: 0;
    top: 0;
    z-index: 3;
}
ul.thumb li img.hover
{
    background: url(thumb_bg.png) no-repeat center center; /* Image used as background on hover effect border: none; /* Get rid of border on hover */
}