void BeginAddMode()
{
ViewState.Remove(CMSViewStateManager.FormID);
pnlFormItem.Visible = true;
txtCode.Text = string.Empty;
txtDescription.Text = string.Empty;
txtName.Text = string.Empty;
txtUrl.Text = string.Empty;
btnSave.Visible = true;
btnUpdate.Visible = false;
pnlFormItem.DefaultButton = btnSave.ID;
}
#endregion