#nav {
	margin: 0 0 0 0;
	padding: 20px 0 0 0;
	float: left;
	display: inline;
	height:20px;
}

#nav ul {	
	position: relative;
	width: 800px;
	height: 20px;
	margin: 0px 0 0 0;
	padding: 0;
	list-style: none;
}

#nav li {
	margin: 0; 
	padding: 0;
	list-style-type: none;
	display: inline;
}

#nav a {
	float: left;
	margin: 0;
	padding: 35px 0 0 0;
	overflow: hidden;
	width: 100px;
	height: 0; 
}

#nav-bio a {
	width:128px;
	background: url(../images/bio-off.png) no-repeat 0 0;
}

#nav-bio a:hover {
	width:128px;
	background: url(../images/bio-on.png) no-repeat;
}

#nav-excerpt a {
	width:128px;
	background: url(../images/excerpt-off.png) no-repeat;
}

#nav-excerpt a:hover {
	width:128px;
	background: url(../images/excerpt-on.png) no-repeat;
}

#nav-hnotes a {
	width:208px;
	background: url(../images/hnotes-off.png) no-repeat;
}

#nav-hnotes a:hover {
	width:208px;
	background: url(../images/hnotes-on.png) no-repeat;
}