Login script!!
/////////////////
<?php
include("inc/mysql.php");

$user = mysql_real_escape_string($_POST['user']);
$pass = mysql_real_escape_string(sha1($_POST['pass']));

$sql = "SELECT * FROM users";
$result = mysql_query($sql) or die(mysql_error());
$row = mysql_fetch_array($result);

if($row['user'] != $user) {
	die('Brugernavn er forkert');
} elseif($row['user'] == $user) {
	$find_pass = "SELECT * FROM users WHERE user='$user'";
	$tjek_pass = mysql_query($find_pass) or die(mysql_error());
	$row_pass = mysql_fetch_array($tjek_pass);

	if($row_pass['pass'] != $pass){
		die('Password er forkert');
	} elseif($row_pass['pass'] == $pass){
		$_SESSION['user'] = $user;
		header("Location: index.php");
	}
}
?>
///////////////////////////////////////////
///////////////////////////////////////////
///////////////////////////////////////////
Navigation som gerne skulle tjekke om man er logget ind ;)
///////////////////////////////////////////
<div id="menu">
	<ul>
		<li><a href="index.php">Forside</a></li>
		<li><a href="index.php?p=referencer">Referencer</a></li>
		<li><a href="index.php?p=kontakt">Kontakt</a></li>
	<?php
		ini_set('display_errors',1);
error_reporting(E_ALL);
	if(isset($_SESSION['user'])) {
		echo "<li><a href='#'>Admin Panel</a></li>";
		}
	?>
	</ul>
</div>