void BeginAddMode()
{
ViewState.Remove(CMSViewStateManager.HtmlBlockID);
pnlHtmlBlockItem.Visible = true;
txtName.Text = string.Empty;
txtDetails.Text = string.Empty;
btnSave.Visible = true;
btnUpdate.Visible = false;
pnlHtmlBlockItem.DefaultButton = btnSave.ID;
}
#endregion