function showBranch(branch){ 
   var objBranch = document.getElementById(branch); 
   //var sClosed = " " + branch; 
  // var sOpen = " " + branch; 
   var objTwig = document.getElementById(branch + "-link"); 
   if(objBranch.style.display=="block") 
       { 
       objBranch.style.display="none"; 
      // objTwig.innerHTML = sClosed; 
       } 
   else 
       { 
       objBranch.style.display="block"; 
       //objTwig.innerHTML = sOpen; 
       } 
}