.thumb{
			position: relative;
			padding-right: 20px;
			z-index: 0;
			}
			
			.thumb:hover{
			background-color: transparent;
			z-index: 50;
			}
			
			.thumb span{ 
			position: absolute;
			background-color: lightyellow;
			padding: 0px;
			left: -1000px;
			border: 1px dashed gray;
			visibility: hidden;
			color: black;
			text-decoration: none;
			}
			
			.thumb span img{
			border-width: 0;
			padding: 2px;
			}
			
			.thumb:hover span{
			visibility: visible;
			vertical-align:top;			
			left: 0px;		
			}