.thr{
position: relative;
z-index: 0;
}

.thr:hover{
background-color: transparent;
z-index: 50;
}

.thr span{
	position: absolute;
	background-color: lightyellow;
	padding: 5px;
	left: -1200px;
	border: 1px dashed gray;
	color: black;
	text-decoration: none;
	visibility: visible;
}

.thr span img{ /*CSS for enlarged image*/
border-width: 0;
padding: 2px;
}

.thr:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: 0;
left: -250px; /*position where enlarged image should offset horizontally */

}