body {background-color:#0066FF;}

a:link {font-family:"Comic Sans MS"; font-size:16px; color: #000000;font-weight:bold; text-decoration:none;}
a:visited {font-family:"Comic Sans MS"; font-size:16px; color:#000000;text-decoration: none;font-weight:bold;}
a:hover {font-family:"Comic Sans MS"; font-size:16px; color:#0033FF;text-decoration:none;font-weight:bold;}

#container
{
position:relative;
margin-left: auto;
margin-right: auto;
width: 900px;
text-align: left;
}

#leftcontent { 
	position:absolute;
	left:543px;
	top:540px;
	width:413px;
	padding: 20px;
	font-family:"Comic Sans MS";
	font-size:24px;
	height:32px;
	overflow:visible;
	}
	
#rightcontent{
	position:absolute;
	left:-384px;
	top: -409px;
	width:673px;
	padding: 2px;
	font:Arial, Helvetica, sans-serif;
	font-size:18px;
	font-weight: 50;
	color:#000000;
	overflow:visible;
	height: 367px;
}
#introbox{
	position:absolute;
	top:75px;
	width: 412px;
	font:Arial, Helvetica, sans-serif;
	font-size:14px;
	font-style:bold;
	color:#000000;
	overflow:visible;
	left: 151px;
	height: 253px;
}


<style type="text/css">


.gallerycontainer{
position: relative;
height:450px;
}

.thumbnail img{
border: 1px solid white;
margin: 0 10px 10px 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: 230px; /*position where enlarged image should offset horizontally */
z-index: 50;
}