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

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

.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
background-color: #ffffff;
padding:15px;
left: -1000px;
border: 2px solid #00a109;
visibility: hidden;
color: black;
text-decoration: none;
font-family:Verdana, Arial, Helvetica, sans-serif;
font-size: 12px;
line-height:14px;
color:#000000;
}

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

.thumbnail:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: -250px;
left: -400px; 
}/*position where enlarged image should offset horizontally */


.thumbnail:hover span.low{ /*CSS for enlarged image on hover*/
visibility: visible;
top: -400px;
left: -400px; 
}/*position where enlarged image should offset horizontally */