ok...
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<link rel="stylesheet" type="text/css" href="aboutus.css" />
<?php # Script 3.4 - index.php
$page_title = 'About Us';
include ('includes/header.html');
?>
</head>
<body>
<div id="container">
<!--Begin Header-->
<!--End Header-->
<!--Begin topnav-->
<ul id="topnav">
<li><a id="farleft" href="index.html">Home</a></li>
<li><a href="aboutus.html">About Us</a></li>
<li><a href="learn.html">Learn</a></li>
<li><a href="getinvolved.html">Get Involved</a></li>
</ul>
<!--End topnav-->
<!--Begin content-->
<div id="content">
CONTENT
</div>
<!--End content-->
<!--Begin sidenav-->
<div id="sidenav">
About Us SIDE NAV
</div>
<!--End sidenav-->
<!--Begin footer-->
<?php
include ('includes/footer.html');
?>
</html>
<!--End footer-->
what is wrong????? the footer and header dont show up...