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