HTML

	<div id="navcontainer">
	<ul id="navlist">
	<li id="active"><a href="#" id="current">Item one</a></li>
	<li><a href="#">Item two</a></li>
	<li><a href="#">Item three</a></li>
	<li><a href="#">Item four</a></li>
	<li><a href="#">Item five</a></li>
	</ul>
	</div>

CSS
	#navlist{
	  border-bottom: 1px solid #ccc;
  	  margin: 0;
	  padding-bottom: 19px;
	  padding-left: 10px;
	}

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

	#navlist a:link, #navlist a:visited{
	  background: #E8EBF0;
  	  border: 1px solid #ccc;
	  color: #666;
	  float: left;
	  font-size: small;
	  font-weight: normal;
	  line-height: 14px;
	  margin-right: 8px;
	  padding: 2px 10px 2px 10px;
	  text-decoration: none;
	}

	#navlist a:link#current, #navlist a:visited#current{
	  background: #fff;
	  border-bottom: 1px solid #fff;
	  color: #000;
	}

	#navlist a:hover { color: #f00; }

	  body.section-1 #navlist li#nav-1 a,
	  body.section-2 #navlist li#nav-2 a,
	  body.section-3 #navlist li#nav-3 a,
	  body.section-4 #navlist li#nav-4 a
	{
	background: #fff;
	border-bottom: 1px solid #fff;
	color: #000;
	}

	#navlist #subnav-1,
	#navlist #subnav-2,
	#navlist #subnav-3,
	#navlist #subnav-4
	{
	  display: none;
	  width: 90%;
	}

	body.section-1 #navlist ul#subnav-1,
	body.section-2 #navlist ul#subnav-2,
	body.section-3 #navlist ul#subnav-3,
	body.section-4 #navlist ul#subnav-4
	{
	  display: inline;
	  left: 10px;
	  position: absolute;
	  top: 95px;
	}

	body.section-1 #navlist ul#subnav-1 a,
	body.section-2 #navlist ul#subnav-2 a,
	body.section-3 #navlist ul#subnav-3 a,
	body.section-4 #navlist ul#subnav-4 a
	{
	  background: #fff;
	  border: none;
	  border-left: 1px solid #ccc;
	  color: #999;
	  font-size: smaller;
	  font-weight: bold;
	  line-height: 10px;
	  margin-right: 4px;
	  padding: 2px 10px 2px 10px;
	  text-decoration: none;
	}

	#navlist ul a:hover { color: #f00 !important; }

	#contents
	{
	  background: #fff;
	  border: 1px solid #ccc;
	  border-top: none;
	  clear: both;
	  margin: 0px;
	  padding: 15px;
	}