var getContent = function(ruta,args,el) {
	if($type(el)!='element') el=$(el);
	el.empty().addClass('loading');
	if($('info')) $('info').setHTML('cargando...').setStyle('visibility', 'visible');
    new Ajax(ruta, {
		method:'post',
		postBody:args,
		update:el,
		evalScripts: true,
        onComplete:function(e) {
			$('info').empty().setStyle('visibility', 'hidden');
			el.removeClass('loading');
		}
    }).request();
}