.thumbnail img{
border: 1px dotted white;
margin: 0 5px 5px 0;
font-family:verdana;
}

.thumbnail:hover{
background-color: gainsboro;
text-decoration: none;
font-family:verdana;
}

.thumbnail:hover img{
border: 1px solid white;
font-family:verdana;
}

.thumbnail span{ /*CSS for enlarged image*/
position:absolute;
background-color: #F8F8FF;
padding: 5px;
left: -500px;
border: 1px solid gray;
visibility: hidden;
color: black;
text-decoration: none;
-moz-border-radius:10px;
}

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

.thumbnail:hover span{ /*CSS for enlarged image*/
visibility: visible;top:400px;left:-200px; /*position where enlarged image should offset horizontally */
z-index: 50;
}