function MostrarLetra(id)
  {
   document.getElementById('numero').style.display = "none";
   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 = "none";
   document.getElementById('F').style.display = "none";
   document.getElementById('G').style.display = "none";
   document.getElementById('H').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('Q').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('W').style.display = "none";
   document.getElementById('X').style.display = "none";
   document.getElementById('Y').style.display = "none";
   document.getElementById('Z').style.display = "none";
   document.getElementById(id).style.display = "block";
  }
  
function MostrarTodos()
  {
   document.getElementById('numero').style.display = "block";
   document.getElementById('A').style.display = "block"; 
   document.getElementById('B').style.display = "block";
   document.getElementById('C').style.display = "block";
   document.getElementById('D').style.display = "block";
   document.getElementById('E').style.display = "block";
   document.getElementById('F').style.display = "block";
   document.getElementById('G').style.display = "block";
   document.getElementById('H').style.display = "block";
   document.getElementById('I').style.display = "block";
   document.getElementById('J').style.display = "block";
   document.getElementById('K').style.display = "none";
   document.getElementById('L').style.display = "block";
   document.getElementById('M').style.display = "block";
   document.getElementById('N').style.display = "block";
   document.getElementById('O').style.display = "block";
   document.getElementById('P').style.display = "block";
   document.getElementById('Q').style.display = "block";
   document.getElementById('R').style.display = "none";
   document.getElementById('S').style.display = "block";
   document.getElementById('T').style.display = "block";
   document.getElementById('U').style.display = "none";
   document.getElementById('V').style.display = "none";
   document.getElementById('W').style.display = "block";
   document.getElementById('X').style.display = "none";
   document.getElementById('Y').style.display = "none";
   document.getElementById('Z').style.display = "none";


  }