protected void Page_Load(object sender, EventArgs e)
        {
            using (ProductProvider provider = new ProductProvider())
            {
                if (!string.IsNullOrEmpty(Request["nid"]))
                {
                    try
                    {
                        Guid nid = new Guid(Request["nid"]);
                        int lmaxVersion = provider.getMaxVersionByNomenID(nid) + 1;
                        maxVersion = lmaxVersion.ToString();
                    }
                    catch
                    {
                        maxVersion = "";
                    }

                }
                else
                {
                    maxVersion = "";
                }
            }
        }