function affichageToggle(desc) {
	if (document.getElementById) {
		if(document.getElementById(desc).style.display == 'block') { document.getElementById(desc).style.display = 'none'; }
		else { document.getElementById(desc).style.display = 'block'; }
	}
	return false; 
};

function fermeDescriptions( idDescriptions ) {
	var menu;
	if (document.getElementById) {
		for (var i = 0; i < idDescriptions.length; i++) {
			menu = document.getElementById(idDescriptions[i]);
			menu.style.display = "none";
		}
	}
};