public static function create()
 {
     global $user;
     if ($_GET['nextpage'] == 1) {
         $page_1_passed = true;
         if (!$_POST['content']) {
             $page_1_passed = false;
             $error = "You must enter a text";
         }
     } else {
         $page_1_passed = false;
         $error = "";
     }
     if ($page_1_passed == false) {
         $template = new HTMLTemplate("base/admin/system_message/add.html");
         $paramquery = $_GET;
         $paramquery['nextpage'] = "1";
         $params = http_build_query($paramquery, '', '&');
         $template->set_var("params", $params);
         if ($error) {
             $template->set_var("error", $error);
         } else {
             $template->set_var("error", "");
         }
         if ($_POST['content']) {
             $template->set_var("content", $_POST['content']);
         } else {
             $template->set_var("content", "");
         }
         $template->output();
     } else {
         $paramquery = $_GET;
         unset($paramquery['nextpage']);
         unset($paramquery['action']);
         $params = http_build_query($paramquery);
         $system_message = new SystemMessage(null);
         if ($system_message->create($user->get_user_id(), $_POST['content'])) {
             Common_IO::step_proceed($params, "Add System Message", "Operation Successful", null);
         } else {
             Common_IO::step_proceed($params, "Add System Message", "Operation Failed", null);
         }
     }
 }