function initialize(){
  resetStyles() ;
  document.getElementById('a').style.fontWeight = "bold" ;
  document.getElementById('a-').style.display = "block" ;
};

function cursorOver(elm){
  elm.style.cursor = "pointer" ;
};

function cursorClick(elm){
  resetStyles() ;
  elm.style.fontWeight = "bold" ;
  document.getElementById(elm.id+'-').style.display = "block" ;
};

function resetStyles(){
  document.getElementById('a').style.fontWeight = "normal" ;
  document.getElementById('b').style.fontWeight = "normal" ;
  document.getElementById('c').style.fontWeight = "normal" ;
  document.getElementById('d').style.fontWeight = "normal" ;
//  document.getElementById('e').style.fontWeight = "normal" ;
  document.getElementById('f').style.fontWeight = "normal" ;
//  document.getElementById('g').style.fontWeight = "normal" ;
  document.getElementById('h').style.fontWeight = "normal" ;
  document.getElementById('ch').style.fontWeight = "normal" ;
//  document.getElementById('i').style.fontWeight = "normal" ;
  document.getElementById('j').style.fontWeight = "normal" ;
  document.getElementById('k').style.fontWeight = "normal" ;
  document.getElementById('l').style.fontWeight = "normal" ;
  document.getElementById('m').style.fontWeight = "normal" ;
  document.getElementById('n').style.fontWeight = "normal" ;
  document.getElementById('o').style.fontWeight = "normal" ;
  document.getElementById('p').style.fontWeight = "normal" ;
  document.getElementById('r').style.fontWeight = "normal" ;
  document.getElementById('s').style.fontWeight = "normal" ;
  document.getElementById('t').style.fontWeight = "normal" ;
  document.getElementById('u').style.fontWeight = "normal" ;
  document.getElementById('v').style.fontWeight = "normal" ;
//  document.getElementById('z').style.fontWeight = "normal" ;

  document.getElementById('a-').style.display = "none" ;
  document.getElementById('b-').style.display = "none" ;
  document.getElementById('c-').style.display = "none" ;
  document.getElementById('d-').style.display = "none" ;
//  document.getElementById('e-').style.display = "v" ;
  document.getElementById('f-').style.display = "none" ;
//  document.getElementById('g-').style.display = "none" ;
  document.getElementById('h-').style.display = "none" ;
  document.getElementById('ch-').style.display = "none" ;
//  document.getElementById('i-').style.display = "none" ;
  document.getElementById('j-').style.display = "none" ;
  document.getElementById('k-').style.display = "none" ;
  document.getElementById('l-').style.display = "none" ;
  document.getElementById('m-').style.display = "none" ;
  document.getElementById('n-').style.display = "none" ;
  document.getElementById('o-').style.display = "none" ;
  document.getElementById('p-').style.display = "none" ;
  document.getElementById('r-').style.display = "none" ;
  document.getElementById('s-').style.display = "none" ;
  document.getElementById('t-').style.display = "none" ;
  document.getElementById('u-').style.display = "none" ;
  document.getElementById('v-').style.display = "none" ;
  //document.getElementById('z-').style.display = "none" ;
}