img {
 border:1px solid black;
 }	

.thumb {
 position:relative; 
 top:0;
 left:0; 
 }
  
.thumb a {
 margin:0;
 text-decoration:none;
 }

.thumb a:hover {
 background-color:black;	
 }

.thumb a .grand {
 display:block;
 position:absolute; 
 width:0; 
 }	  
  
.thumb a:hover .grand { 
 position:absolute; 
 top:0px;
 left:-149px;
 width:400px; 
 height:300px; 
 
 }.thumb a .grand1 {
 display:block;
 position:absolute; 
 width:0; 
 }	  
  
.thumb a:hover .grand1 { 
 position:absolute; 
 top:0px;
 left:0px;
 width:400px; 
 height:300px; 
 }