var head="display:''"
function change()
{
   if(!document.all)
      return
   if (event.srcElement.id=="foldheader")
      {
      var srcIndex = event.srcElement.sourceIndex
      var nested = document.all[srcIndex+1]
      if (nested.style.display=="none")
	  {
         nested.style.display=''
      }
      	else
		{
         nested.style.display="none"
        }
   }
}

document.onclick=change

//-->