private List<Model.Product> GetRelateds(Model.Product prod)
        {
            int type = prod.GetTyp();
            string[] favrelateds = prod.GetFavouriteRelateds();
            List<Model.Product> relateds = new List<Model.Product>();

            if (type == 1)
            {
                foreach (Model.Movie mov in db.movies)
                    if (StringArrayContains(favrelateds, mov.ID + ""))
                        relateds.Add(new Model.Product(mov));
            }
            else if (type == 2)
            {
                foreach (Model.Book mov in db.books)
                    if (StringArrayContains(favrelateds, mov.ID + ""))
                        relateds.Add(new Model.Product(mov));
            }
            else if (type == 3)
            {
                foreach (Model.Music mov in db.musics)
                    if (StringArrayContains(favrelateds, mov.ID + ""))
                        relateds.Add(new Model.Product(mov));
            }

            return relateds;
        }