function afficher_photo(nom)
	{
		var photo = document.getElementById(nom);
		photo.style.visibility = 'visible';
	}
	
function effacer_photo(nom)
	{
		var photo = document.getElementById(nom);
		photo.style.visibility = 'hidden';
	}
	
	function afficher_select(nom)
	{
		var bulle = document.getElementById(nom);
		bulle.style.visibility = 'visible';
	}
	
	function effacer_select(nom)
	{
		var bulle = document.getElementById(nom);
		bulle.style.visibility = 'hidden';
	}