.thumbnail-item {
 position:relative;
 float: left; 
 margin: 0px 5px;
}
 
.thumbnail-item  {
 display: block;
}
 
.thumbnail-item img.thumbnail {
 border:3px solid #ccc;
}
   
.tooltip {
 display: none;
 position: absolute;
 padding: 8px 0 0 8px;
}
 
 .tooltip span.overlay { 
  background: url(images/overlay.png) no-repeat;
  position: absolute;
  top: 0px;
  left: 0px;
  display: block;
  width: 350px;
  height: 200px;
 }
.imageShadow
{
     width:200px;
     height:125px;
}