function montre(id, display) {
  if (display != 'block' && display != 'inline') 
    display = 'block';
  if (document.getElementById) {
    document.getElementById(id).style.display = display;
  }
  else if (document.all) {
    document.all[id].style.display = display;
  }
  else if (document.layers) {
    document.layers[id].display = display;
  }
}

function cache(id) {
  if (document.getElementById) {
    document.getElementById(id).style.display = 'none';
  }
  else if (document.all) {
    document.all[id].style.display = 'none';
  }
  else if (document.layers) {
    document.layers[id].display = 'none';
  }
}