function submenuIn(){
	id = $(this).attr('id')+'_desc';
	$('#'+id).show();
}
function submenuOut(){
	id = $(this).attr('id')+'_desc';
	$('#'+id).hide();
}
$(document).ready(function() {
	/*$("#menu_ressources li a").mouseenter(submenuIn).mouseleave(submenuOut);
	$("#menu_ircam li a").mouseenter(submenuIn).mouseleave(submenuOut);*/
});