.gallerycontainer{

position: relative;

/*Add a height attribute and set to largest image's height to prevent overlaying*/

}



.thumbnail img{

border: 1px solid white;

margin: 0 5px 5px 0;

}



.thumbnail:hover{

background-color: transparent;

}



.thumbnail:hover img{

border: 1px solid blue;

}



.thumbnail span{ /*CSS for enlarged image*/

position: absolute;

background-color: lightyellow;

padding: 5px;

left: -1000px;

border: 1px dashed gray;

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*/

visibility: visible;

top: 0;

left: 255px; /*position where enlarged image should offset horizontally */

z-index: 50;

}