protected void Page_Load(object sender, EventArgs e)
        {
            //Bind data to table retrieved from DatabaseDAO method name GetLookup on Page Load
            Maintainence_Table.DataSource = dao.GetLookup();
            Maintainence_Table.DataBind();
            Maintainence_Table.HeaderRow.TableSection = TableRowSection.TableHeader;

            //Whenever user redirects back to this page ensure sessions are cleared so as not to override the next session values on edit
            Session.Add("type", null);
            Session.Add("lookup", null);
            Session.Add("codedesc", null);
        }