Index: branches/5.2.x/core/admin_templates/users/users_list.tpl
===================================================================
diff -u -N -r14437 -r14663
--- branches/5.2.x/core/admin_templates/users/users_list.tpl	(.../users_list.tpl)	(revision 14437)
+++ branches/5.2.x/core/admin_templates/users/users_list.tpl	(.../users_list.tpl)	(revision 14663)
@@ -55,6 +55,22 @@
 
 				a_toolbar.AddButton( new ToolBarSeparator('sep2') );
 
+				a_toolbar.AddButton( new ToolBarButton('frontend_mail', '<inp2:m_phrase label="la_ToolTip_LoginAs" escape="1"/>',
+					function() {
+						var $user_ids = Grids['u.regular'].GetSelected();
+
+						if ($user_ids.length > 1) {
+							alert('<inp2:m_Phrase label="la_error_YouMustSelectOnlyOneUser" js_escape="1"/>');
+						}
+						else {
+							var $user_id = $user_ids.shift(),
+								$url = '<inp2:m_Link template="index" index_file="../index.php" user_id="#USER_ID#" u_event="OnLoginAs" pass="m,u" no_amp="1" js_escape="1"/>';
+
+							window.open($url.replace('#USER_ID#', $user_id), 'frontend_login');
+						}
+					}
+				) );
+
 				<inp2:m_if check="m_ModuleEnabled" module="In-Portal">
 					a_toolbar.AddButton(
 						new ToolBarButton(
@@ -93,6 +109,6 @@
 
 <inp2:m_RenderElement name="grid" PrefixSpecial="u.regular" IdField="PortalUserId" grid="RegularUsers"/>
 <script type="text/javascript">
-	Grids['u.regular'].SetDependantToolbarButtons( new Array('edit', 'delete', 'setprimary', 'e-mail', 'approve', 'decline') );
+	Grids['u.regular'].SetDependantToolbarButtons( new Array('edit', 'delete', 'setprimary', 'frontend_mail', 'e-mail', 'approve', 'decline') );
 </script>
 <inp2:m_include t="incs/footer"/>
\ No newline at end of file