protected void chxSameBillingAddress_CheckedChanged(object sender, EventArgs e)
 {
     if (chxSameBillingAddress.Checked)
     {
         AddressEdit_Billing1.CurrentAddress = AddressEdit_Shipping1.GetCloningAddress();
         AddressEdit_Billing1.Bind();
     }
     else
     {
         AddressEdit_Billing1.Clear();
     }
 }