.gallery_wrapper{
position: relative;
height:400px; /*largest image h = 367(350 if comments line there) (or this h - 33px), max w=480*/
}

.thumbnail img{
border: 1px solid white;
margin: 0 5px 5px 0;
}

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

.thumbnail:hover img{
border: 1px;
border-style: solid;
border-color: #666666;
}

.thumbnail span{ /*CSS for enlarged image*/
position: absolute;
visibility: hidden;
text-decoration: none;
margin-top:30px;
}

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

.thumbnail:hover span{ /*CSS for enlarged image*/
visibility: visible;
top: 0;
left: 257px; /*position where enlarged image should offset horizontally (max img width = 480)*/
z-index: 50;
}