Index: lams_tool_survey/web/includes/javascript/surveyitem.js
===================================================================
diff -u -rfa4248fa3e32168af48f370a59d77a91b0e0cb20 -r29fac4bd0bdf28bcaaeee7aae4020ccb15b6e520
--- lams_tool_survey/web/includes/javascript/surveyitem.js	(.../surveyitem.js)	(revision fa4248fa3e32168af48f370a59d77a91b0e0cb20)
+++ lams_tool_survey/web/includes/javascript/surveyitem.js	(.../surveyitem.js)	(revision 29fac4bd0bdf28bcaaeee7aae4020ccb15b6e520)
@@ -91,6 +91,10 @@
 			$("instructionList").value = Form.serialize("instructionForm");
 		$("surveyItemForm").submit();
 	}
+	
 	function cancelSurveyItem(){
-		window.top.hideMessage();
+		var win = window.hideMessage ? window : window.top;
+		if (win.hideMessage != null){
+			win.hideMessage();
+		}
 	}