Are you doing this for experience or for something else? As if you use google, there are some already out there.
Download, look at the code, and play with it from there......

Here is another way to create your table...

CREATE TABLE `users` (
`ID` int(11) NOT NULL auto_increment,
`Username` varchar(255) NOT NULL default '',
`Password` varchar(255) NOT NULL...

Here is what I suggest:

Create a page called secure.php
add the following code as it is: ONLY change " your_login_page "


<?php
session_start();
if (empty($_SESSION['username'])) ...

I used the following code:

<?php
session_start();
if (empty($_SESSION['username']))
{
header("location:index.php");
exit;
}
?>

Here is what I do

secure.php

<?php
session_start();
if (empty($_SESSION['username'])) {
header("location:index.php");
exit; }
?>

I think that you would need access to his site to place code on the page you want secured.