From 13c333d7e664a7cdd453d0e742013dae3e3ed907 Mon Sep 17 00:00:00 2001
From: Michael Wiebusch <stratomaster@gmx.net>
Date: Mon, 24 Jun 2013 11:07:20 +0200
Subject: [PATCH] updated cgitest.pl

---
 xml_spielwiese/cgitest.pl | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/xml_spielwiese/cgitest.pl b/xml_spielwiese/cgitest.pl
index 7a863ef..4f59e44 100755
--- a/xml_spielwiese/cgitest.pl
+++ b/xml_spielwiese/cgitest.pl
@@ -407,6 +407,7 @@ function writeToElementId(input,destId){
 
 
 function toggleVis(elementId) {
+if(document.getElementById(elementId)){
 if( document.getElementById(elementId).style.visibility == "visible") {
 	document.getElementById(elementId).style.visibility = "collapse";
 	visHash[elementId]=false;
@@ -415,17 +416,24 @@ if( document.getElementById(elementId).style.visibility == "visible") {
 	visHash[elementId]=true;
 }
 }
+}
 function showElement(elementId) {
+	if(document.getElementById(elementId)){
 	document.getElementById(elementId).style.visibility = "visible" ;
 	visHash[elementId]=true;
+	}
 }
 function hideElement(elementId) {
+	if(document.getElementById(elementId)){
 	document.getElementById(elementId).style.visibility = "hidden" ;
 	visHash[elementId]=false;
+	}
 }
 function collapseElement(elementId) {
+	if(document.getElementById(elementId)){
 	document.getElementById(elementId).style.visibility = "collapse" ;
 	visHash[elementId]=false;
+	}
 }
 
 </script>
-- 
2.43.0