public function init()
{
parent::init();
if (!isset($_SESSION["login"])) {
$_SESSION["login"] = LOGIN_NULL;
}
if ($_SESSION["login"] != LOGIN_OK && $_GET["a"] != "login") {
$this->login_get();
exit;
}
if (isset($_SESSION["username"])) {
$this->assign("username", $_SESSION["username"]);
}
}