function Rol_Bouton(indice)
	{switch (indice)
	  {case 1: document.images["Lien"+indice].src="Images/Accueil_V.jpg";
	             break;

           case 2: document.images["Lien"+indice].src="Images/Historique_V.jpg";
	             break;

           case 3: document.images["Lien"+indice].src="Images/Photos_V.jpg";
	             break;

           case 4: document.images["Lien"+indice].src="Images/Contact_V.jpg";
	             break;

           case 5: document.images["Lien"+indice].src="Images/Plan_V.jpg";
	             break;
	  	             
	   default: document.images["Lien"+indice].src="Images/Transparent.gif";
	            break;
	  }           
	}