function changeOn(colorOn)
       {
       source=event.srcElement
         if ((source.tagName=="TR") || (source.tagName == "TABLE"))
         {
         return
         }
       while(source.tagName != "TD")
       {
       source = source.parentElement
         if ((source.style.backgroundColor=colorOn) && (source.id!="ignore"))
         {
         source.style.backgroundColor=colorOn
         }
       }
       }
       function changeOna(colorOn)
       {
       document.tags.td.backgroundColor=colorOn
       }
       function changeOff(colorOff)
       {
         if ((event.fromElement.contains(event.toElement)) || (source.contains(event.toElement)) || (source.id == "ignore"))
         {
         return
         }
         if (event.toElement!=source)
         {
         source.style.backgroundColor=colorOff
         }
       }