I know this example is horizontal so far. But I intend to convert it to a horizontal once the vertical is complete. The problem is that I have menu items 3 levels deep. With the current code, when the user hovers over a menu item with sub-items, all subsequent levels appear. I'm trying to ensure maximum browser compatibility. And I'm also trying to minimize the need to use classes on every line.

HTML:
Code:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<meta http-equiv="Content-Type" content="application/xhtml+xml" />
<title>Navigation Testing</title>
<link rel="stylesheet" type="text/css" href="normalize.v2.1.0.css" />
<link rel="stylesheet" type="text/css" href="nav.css" />
</head>
<body>
<div id="webpage">
<div id="header">
<h1>Navigation Testing</h1>
</div>
<div id="vnav">
	<ul>
		<li><a href="#">Home</a></li>
		<li><a href="#">Tutorials</a>
			<ul>
				<li><a href="#">Photoshop</a></li>
				<li><a href="#">Illustrator</a></li>
				<li><a href="#">Dreamweaver</a>
					<ul>
						<li><a href="#">HTML</a></li>
						<li><a href="#">CSS</a></li>
					</ul>
				</li>
			</ul>
		</li>
		<li><a href="#">Articles</a>
			<ul>
				<li><a href="#">Web Design</a></li>
				<li><a href="#">User Experience</a></li>
			</ul>
		</li>
		<li><a href="#">Inspiration</a></li>
	</ul>
</div>
<div id="main">
<p>This is the main body of the page.</p>
</div>
<div id="footer">
</div>
</div>
</body>
</html>
CSS:
Code:
@charset "utf-8";
/* CSS Document */

ol, ul {
	list-style-type:none;
}

a {
	text-decoration: none;
}

#vnav li {
	display: block;
	border: solid 1px #000000;
	padding-top: 4px;
	padding-left: 4px;
	width: 80px;
	height: 20px;
	margin-bottom: -1px;
}

#vnav a {
	display: block;
	color: #006600;
}

#vnav a:hover {
	color: #009900;
}

#vnav ul li:hover {
	position: relative;
	background-color: #eeeeee;
}

#vnav ul li ul, #vnav ul li ul li ul {
	position: absolute;
	display: none;
	padding-left: 4px;
}

#vnav ul li ul li {
	width: 150px;
}

#vnav ul li:hover ul {
	display: block;
	left: 80px;
}
Thank you for any and all constructive input!