protected void btnContactSubmit_Click(object sender, EventArgs e)
    {
        if (Page.IsValid)
        {
            CustomerMessageStore cust = new CustomerMessageStore();

            cust.lastName  = txtLastName.Text;
            cust.firstName = txtFirstName.Text;
            cust.email     = txtEmail.Text;
            cust.subject   = txtSubject.Text;
            cust.message   = txtMessage.Text;

            BookStore bl = new BookStore();
            bl.CustomerMessage(cust);
            AddCookie();
            Server.Transfer("successpage.aspx?success=contact");
        }
    }