[jhbug]

Hi! I'm new to PHP, so forgive me if I am missing an obvious answer. I can't get a small portion of my include or switch statement to work correctly.
I am trying to develop my own site using PHP instead of frames with this layout:


|_________________________|
|_______ Header __________|
|_________________________|
[__ Nav1___ Nav2 ___ Nav3 __]
|_________________________ |
|_________________________ |
|_________________________ |
|_______ Content __________|
|_________________________ |
|_________________________ |

But within the content, I am trying to make a seperate navigation list like this:


(Content)
| [subnav item1] ___ subContent _____|
| [subnav item2] ___________________|
| [subnav item3] ___________________|

where the subContent changes depending on which subnav item is clicked.

To do this, I've been using something like this:

<!-- Sample -->
<div id="header">
       <?php include('header.php')?>
</div>

<a id="nav" href="index.php?page=nav1">Nav1</a>
<a id="nav" href="index.php?page=nav2">Nav2</>
//etc for nav3

<?php
       $page = $_GET['page'];

       switch ($page){
                 case "nav1":
                        include('Nav1.php');
                       break;
                //etc for nav2, nav3
                 default:
                        include('home.php');
         } ?>

And then within Nav1 I will have:
           <div id="subnav">
                  <?php include('subnav.php')?>
            </div>

            <div id="subcontent">
                   <?php 
                        $subc = $_GET['page']
                       switch($subc){
                                  case "sn1":
                                      include('subnav1.php'); break;
                                  default: include(Nav1_home.php) }?>

etc..

So when I visit my page, everything works except the includes statement for the content. The address bar would say "http://website.com/index.php?page=subnav1" but it would show the home page instead of the content which was written in the file subnav1.php. But however, when I visit say Nav1, the default includes "Nav1_home.php" will show up in the subcontent area

Is this because I can't do multiple switch/include statements within each other? How can I work around that? If not, what am I doing wrong?

I've been trying to search multiple forums for a problem close to this but I have not been able to come across one :[