updated cgitest.pl

diff --git a/xml_spielwiese/cgitest.pl b/xml_spielwiese/cgitest.pl
index 7a863ef88af135dfa6f7302a9e060757282ad16c..4f59e44d2e463ec87fae6b09b07827dcbb1ed981 100755 (executable)
--- 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>