function showNote(intNote) {
   if (intNote == 1)
      imagenote1.style.display = 'block';
   else if (intNote == 2)
      imagenote2.style.display = 'block';
   else if (intNote == 3)
      imagenote3.style.display = 'block';
}

function hideNote(intNote) {
   if (intNote == 1)
      imagenote1.style.display = 'none';
   else if (intNote == 2)
      imagenote2.style.display = 'none';
   else if (intNote == 3)
      imagenote3.style.display = 'none';
}