protected void btnSubmit_Click(object sender, EventArgs e)
        {
            PostageOptions o = new PostageOptions();

            o.Price       = Convert.ToDouble(pricePostage.Text);
            o.Description = descriptionPostage.Text;
            o.Name        = namePostage.Text;
            o.ETA         = Convert.ToInt32(etaPostage.Text);
            // Add new postage option
            if (hiddenID.Text.Equals(""))
            {
                QueryClass.AddPostageOption(o);
            }
            else
            {
                //Update Postage
                QueryClass.UpdatePostageOption(o);
            }
            Response.Redirect("ManagePostage.aspx");
        }