function Logout($admin) {

    $cookie = explode("|", base64_decode($admin));
    $result = mysql_query("SELECT password FROM ".$prefix."_admin WHERE admin_name='$cookie[1]'");
    $row = mysql_fetch_array($result);
    $pass = $row['password'];
    if ($cookie[2] == $pass && $pass != "") {
	return $cookie;
    } else {
	unset($admin);
	unset($cookie);
    }
    
    setcookie("admin", false);
    $admin = "";
    header("Location: index.php");
    
}