function toggleMenuOptions(event) {
	if(!$('listnav_menu').visible())
		placerContextuel($('listnav_menu'), event);
	Effect.toggle('listnav_menu', 'blind', {duration: 0.2});
	return false;
}
function updateAffichageListe() {
	//showLoading();
	$('listnav_menu').request(
		{
			onSuccess:function(rep) {
				hideLoading();
				$('listecontenu').innerHTML = rep.responseText;
			}
		}
	);
	return false;	
}