// ********************************************************* affiche ou chache une DIV
   function affCache(truc)
{
	var machin= document.getElementById(truc);
 
	if (machin.style.display == "block") {
		machin.style.display = "none";
	} else {
		machin.style.display = "block";
	}
}


   function Cache(truc)
{   
	var machin= document.getElementById(truc);
		machin.style.display = "none";
}


   function Affiche(truc)
{   
	var machin= document.getElementById(truc);
		machin.style.display = "block";
}