$('#dg3').datagrid({
            onLoadSuccess:function(data){
                if(data.total==0){
                    var dc = $(this).data('datagrid').dc;
                    var header2Row = dc.header2.find('tr.datagrid-header-row');
                    dc.body2.find('table').append(header2Row.clone().css({"visibility":"hidden"}));


                }
            }
        });