.thumbnail{
position: relative;
}

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

.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
background-color: #444849;
left:-1000px;
padding: 5px;
border: 2px black;
visibility: hidden;
color: black;
text-decoration: none;
}

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

.thumbnail:hover span{ /*CSS for enlarged image on hover*/
visibility: visible;
margin-top: -425px;
margin-left: 940px; /*position where enlarged image should offset horizontally */

}