public List<DVD> findByCode(int Id) {
		List<DVD> dvds = new ArrayList<DVD>();
		String query = "SELECT * FROM dvd WHERE id=?";
		em = dbUtil.getEntityManager();
		Query q = em.createNativeQuery(query, DVD.class);
		q.setParameter(1, Id);
		dvds = q.getResultList();
		return dvds;
	}