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

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

.thumbnail span{ /*CSS for enlarged image*/
border-style:outset; border-width:3px; position: absolute;
background-color: #FFFFFF;
padding: 5px;
left: -1000px;
visibility: hidden;
color: #6F8C8F;
text-align:left
}

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

:hover.thumbnail span{ /*CSS for enlarged image on hover*/
visibility: visible;
top: 0;
left: 60px; /*position where enlarged image should offset horizontally */

}