body
{
	background-color:#C0C0C0
}
ul a
{
	display:block;
	width:150px;
	height:30px;
	color:white;
	line-height:30px;
	text-decoration:none;
	text-align:center; 
	
}
ul hover:a
{
	background-position:0,-23px;
	color:#006600;
}
ul li
{
	display:inline;
	float:left;
}
.gallerycontainer{
position: relative;
/*Add a height attribute and set to largest image's height to prevent overlaying*/
}

.thumbnail img{
border: 1px solid black;
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;
z-index: 50 ;
}

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

.thumbnail:hover span{ /*CSS for enlarged image*/
visibility: visible;
top: 0;
left: 230px; /*position where enlarged image should offset horizontally */
z-index: 1;
}