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                      <?php function login()
                      {

                      global $_POST;
                      global $_SESSION;
                      global $_GET;
                      if (isset($_GET["a"]) && ($_GET["a"] == 'logout')) $_SESSION["logged_in"] = false;
                      if (!isset($_SESSION["logged_in"])) $_SESSION["logged_in"] = false;
                      if (!$_SESSION["logged_in"]) {
                      $login = "";
                      $password = "";
                      if (isset($_POST["login"])) $login = @$_POST["login"];
                      if (isset($_POST["password"])) $password = @$_POST["password"];
                      if (($login != "") && ($password != "")) {
                      if (($login == "admin") && ($password == "admin") || ($login == "gary") && ($password == "gary")) {
                      $_SESSION["logged_in"] = true;
                      $_SESSION['visitor']=$_POST['login'];
                }
                      else {
                      ?>

<?php
echo $_SESSION['visitor'];
?>