I'm trying to create a ten button menu that will change the content of a DIV. I have a smaller version as follows:

PHP Code:
<!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" />
<title>Untitled Document</title>
<link href="include/layout.css" type="text/css" rel="stylesheet" />
<script>
function changeContent()
{
document.getElementById('myTable').innerHTML=document.getElementById('showTable').innerHTML;
}
</script>
<script type="text/html" id="showTable">
    <?php See2(); ?>
</script>
</head>

<body>
        <div class="signup">
            <form>
                <input type="image" src="images/BECOME_A_MEMBER.png" border=0 width=150 height=150 onClick="changeContent();return false;" value="Change content">
            </form>
        </div>
    </div>
    <div class="content" id="myTable">
    <?php See1(); ?>
    </div>
</body>
</html>
<?php
function See1()
{echo 
"See One";}

function 
See2()
{echo 
"See Two";}
?>
I would like a similar script like this:

index.php
PHP Code:
<?php
include'func.php';
?>
<!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" />
<title>Untitled Document</title>
</head>
<link href="include/layout.css" type="text/css" rel="stylesheet" />
<script>
function changeContent(func)
{
document.getElementById('myTable').innerHTML=document.getElementById('showTable').innerHTML;
}
</script>
<script type="text/html" id="showTable">
if (func=='HomePage') {<?php Homepage(); ?>}
if (func=='Messages') {<?php Messages(); ?>}
if (func=='Notifications') {<?php Notifications(); ?>}
if (func=='MyStuff') {<?php MyStuff(); ?>}
if (func=='Community') {<?php Community(); ?>}
if (func=='LiveAction') {<?php LiveAction(); ?>}
if (func=='WhatsHot') {<?php WhatsHot(); ?>}
if (func=='RatePics') {<?php RatePics(); ?>}
if (func=='Upload') {<?php Upload(); ?>}
if (func=='IMessanger') {<?php IMessanger(); ?>}
</script>
<body>

<a class="home_out" href="index.php" onClick="changeContent(HomePage);return false;" value="Change content" title="HomePage"></a>
<a class="email_out" href="index.php" onClick="changeContent(Messages);return false;" value="Change content" title="Messages"></a>
<a class="notify_out" href="index.php" onClick="changeContent(Notifications);return false;" value="Change content" title="Notifications"></a>
<a class="mine_out" href="index.php" onClick="changeContent(MyStuff);return false;" value="Change content" title="My Stuff"></a>
<a class="comm_out" href="index.php" onClick="changeContent(Community);return false;" value="Change content" title="Community"></a>
<a class="live_out" href="index.php" onClick="changeContent(LiveAction);return false;" value="Change content" title="Live Action"></a>
<a class="hot_out" href="index.php" onClick="changeContent(WhatsHot);return false;" value="Change content" title="What's Hot"></a>
<a class="rate_out" href="index.php" onClick="changeContent(RatePics);return false;" value="Change content" title="Rate Pics"></a>
<a class="upload_out" href="index.php" onClick="changeContent(Upload);return false;" value="Change content" title="Upload Pics/Vids/Audio"></a>
<a class="im_out" href="index.php" onClick="changeContent(IMessanger);return false;" value="Change content" title="Instant Messanger"></a>

    <div class="content" id="myTable">
    <?php HomePage(); ?>
    </div>
</body>
</html>
func.php
PHP Code:
<?
function HomePage()
{echo
"HomePage";}

function 
Messages()
{echo
"Messages";}

function 
Notifications()
{echo
"Notifications";}

function 
MyStuff()
{echo
"MyStuff";}

function 
Community()
{echo
"Community";}

function 
LiveAction()
{echo
"LiveAction";}

function 
WhatsHot()
{echo
"WhatsHot";}

function 
RatePics()
{echo
"RatePics";}

function 
Upload()
{echo
"Upload";}

function 
IMessanger()
{echo
"IMessanger";}
?>
I get nothing displayed besides the background with the way index.php is. And if I remove the second script ID'd as showTable, I get a Fatal error: Call to undefined function HomePage() even tho its in func.php that was included at the start of index.php