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

.thumbnail:hover{background-color: transparent;z-index: 1000;}

.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
background-color: lightyellow;
padding: 0px;
left: -9000px;
border: 0px;
visibility: hidden;
color: black;
text-decoration: none;}

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

.thumbnail:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;top: -10;left: -250px; /*position where enlarged image should offset horizontally */}

.thumbnail2{position: relative;z-index: 100;}

.thumbnail2:hover{background-color: transparent;z-index: 100;}

.thumbnail2 span{ /*CSS for enlarged image*/
position: absolute;
background-color: lightyellow;
padding: 0px;
left: -9000px;
border: 0px;
visibility: hidden;
color: black;
text-decoration: none;}

.thumbnail2 span img{ /*CSS for enlarged image*/border-width: 0;padding: 0px;}

.thumbnail2:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;top: -50;left: -535px; /*position where enlarged image should offset horizontally */}