diff --git a/op/op.Ajax.php b/op/op.Ajax.php
new file mode 100644
index 000000000..813c35798
--- /dev/null
+++ b/op/op.Ajax.php
@@ -0,0 +1,72 @@
+<?php
+//    MyDMS. Document Management System
+//    Copyright (C) 2012 Uwe Steinmann
+//
+//    This program is free software; you can redistribute it and/or modify
+//    it under the terms of the GNU General Public License as published by
+//    the Free Software Foundation; either version 2 of the License, or
+//    (at your option) any later version.
+//
+//    This program is distributed in the hope that it will be useful,
+//    but WITHOUT ANY WARRANTY; without even the implied warranty of
+//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//    GNU General Public License for more details.
+//
+//    You should have received a copy of the GNU General Public License
+//    along with this program; if not, write to the Free Software
+//    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+include("../inc/inc.Settings.php");
+include("../inc/inc.LogInit.php");
+include("../inc/inc.DBInit.php");
+
+if (!isset($_COOKIE["mydms_session"])) {
+	exit;
+}
+
+require_once("../inc/inc.Utils.php");
+require_once("../inc/inc.ClassSession.php");
+include("../inc/inc.ClassPasswordStrength.php");
+include("../inc/inc.ClassPasswordHistoryManager.php");
+
+/* Load session */
+$dms_session = $_COOKIE["mydms_session"];
+$session = new LetoDMS_Session($db);
+if(!$resArr = $session->load($dms_session)) {
+	echo json_encode(array('error'=>1));
+	exit;
+}
+
+/* Load user data */
+$user = $dms->getUser($resArr["userID"]);
+if (!is_object($user)) {
+	echo json_encode(array('error'=>1));
+	exit;
+}
+$dms->setUser($user);
+include $settings->_rootDir . "languages/" . $resArr["language"] . "/lang.inc";
+
+$command = $_GET["command"];
+
+switch($command) {
+	case 'checkpwstrength':
+		$ps = new Password_Strength();
+		$ps->set_password($_GET["pwd"]);
+		if($settings->_passwordStrengthAlgorithm == 'simple')
+			$ps->simple_calculate();
+		else
+			$ps->calculate();
+		$score = $ps->get_score();
+		if($settings->_passwordStrength) {
+			if($score > $settings->_passwordStrength) {
+				echo json_encode(array('error'=>0, 'strength'=>$score, 'ok'=>1));
+			} else {
+				echo json_encode(array('error'=>0, 'strength'=>$score, 'ok'=>0));
+			}
+		} else {
+			echo json_encode(array('error'=>0, 'strength'=>$score));
+		}
+		break;
+
+}
+?>