Someone

<?php
        $page = $_GET['page'];
        switch($page)
        {
                case "about":
                        require_once("about.php");
                        break;
                case "deanrules":
                        require_once("deanrules.php");
                        break;
                case "pagethree":
                        require_once("page3.php");
                        break;
                default:
                        require_once("index.php");
        }
?>