e JSON data and pull out the data values
                        var color_index = 0;
                        var datasequences = json_data.graph.datasequences;
                        for (var i = 0; i < datasequences.length; i++) {
                            var values = [];
                            for (var j = 0; j < datasequences[i].datapoints.length; j++) {
                                values.push(datasequences[i].datapoints[j].value);
                            };

                           