function showhide(elem) {
	$(elem).toggle();
}

function caricaLista(cat, elem, page) {
	idUpdate = 'lista-'+elem;
	
	new Ajax.Updater(idUpdate, '/moduli/convivium/includes/php/ajax_pietanze_by_cat.php' + page, {
  		parameters: { codice: cat },
		onComplete : function() { /*showhide(elem);*/$(elem).style.display=''; }
	});
}