function activarSubSeccion(idSubSeccion) {
	var target = $('subseccion_' + idSubSeccion);
	if (!(target && $('subsecciones'))) return;

	$A($('subsecciones').childNodes).each(
			function(node) {
				node = $(node);
				if (!(node.nodeType == 1 && node.hasClassName('subseccion'))) return;
				if (node != target && node.visible()) {
					Effect.Fade(node, { duration: 0.5, queue: 'end' });
				}
			}
	);

	if (target.visible()) {
		Effect.Fade(target, { duration: 0.5, queue: 'end' });
	} else {
		Effect.Appear(target, { duration: 0.5, queue: 'end' });
	}
}