internal void ToHTML(HtmlAgilityPack.HtmlNode node)
        {
            HtmlNode table = node.OwnerDocument.CreateElement("table");

            UIUtils.AddTwoColumnRowToTable(table,
                                           GetTable1Node(node),
                                           UIUtils.GetImageHtmlFromChart(chart1, node));
            node.ChildNodes.Add(table);
        }