Index: branches/5.2.x/core/units/users/users_event_handler.php
===================================================================
diff -u -N -r14633 -r14663
--- branches/5.2.x/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 14633)
+++ branches/5.2.x/core/units/users/users_event_handler.php	(.../users_event_handler.php)	(revision 14663)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: users_event_handler.php 14633 2011-10-05 12:10:41Z alex $
+* @version	$Id: users_event_handler.php 14663 2011-10-12 10:57:57Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -133,6 +133,13 @@
 				return defined('DBG_RESET_ROOT') && DBG_RESET_ROOT;
 			}
 
+			if ( $event->Name == 'OnLoginAs' ) {
+				$admin_session =& $this->Application->recallObject('Session.admin');
+				/* @var $admin_session Session */
+
+				return $admin_session->LoggedIn();
+			}
+
 			if ( !$this->Application->isAdminUser ) {
 				$user_id = $this->Application->RecallVar('user_id');
 				$items_info = $this->Application->GetVar($event->getPrefixSpecial(true));
@@ -1761,4 +1768,28 @@
 			$event->SetRedirectParam('reset', 1);
 			$event->SetRedirectParam('pass', 'm');
 		}
+
+		/**
+		 * Perform login of user, selected in Admin Console, on Front-End in a separate window
+		 *
+		 * @param kEvent $event
+		 * @return void
+		 * @access protected
+		 */
+		protected function OnLoginAs(kEvent &$event)
+		{
+			$user_helper =& $this->Application->recallObject('UserHelper');
+			/* @var $user_helper UserHelper */
+
+			$user =& $user_helper->getUserObject();
+			$user->Load( $this->Application->GetVar('user_id') );
+
+			if ( !$user->isLoaded() ) {
+				return ;
+			}
+
+			if ( $user_helper->checkLoginPermission() ) {
+				$user_helper->loginUserById( $user->GetID() );
+			}
+		}
 	}