.thumbnail { position: relative; display: block; }

.thumbnail img{
/*border: 1px solid white;
margin: 0 5px 5px 0; */
height: 50px;
}

.thumbnail:hover{
background-color: transparent;
}

.thumbnail:hover img{
/*border: 1px solid blue;*/
}

.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
/*background-color: lightyellow;
border: 1px dashed gray;
padding: 5px;*/
left: -1000px;
visibility: hidden;
color: black;
text-decoration: none;
}

.thumbnail span img{ /*CSS for enlarged image*/
border-width: 0;
height: 200px;
}

.thumbnail:hover span{ /*CSS for enlarged image*/
visibility: visible;
top: 0;
left: 75px; /*position where enlarged image should offset horizontally */
z-index: 50;
}