diff --git a/src/main/webapp/WEB-INF/jsp/include/top.jsp b/src/main/webapp/WEB-INF/jsp/include/top.jsp
index 76745c8e..9a71be57 100644
--- a/src/main/webapp/WEB-INF/jsp/include/top.jsp
+++ b/src/main/webapp/WEB-INF/jsp/include/top.jsp
@@ -256,7 +256,8 @@ function fn_photoMask(flag, element){
         
         $("div[data-ref='"+dataset.crdnPhotoId+"']").remove();
         
-        if(dataset.mosaic != null && dataset.mosaic != "" 
+        if(dataset.crdnPhotoId != null && dataset.crdnPhotoId != ""
+            && dataset.mosaic != null && dataset.mosaic != "" 
         	&& flag){
 
         	var mosaicInfoArr = dataset.mosaic.split("|");