for (var idx = 0; idx < this.labels.length; idx++) {
var seriesName = this.labels[idx];
var optionsForSeries = this.user_.series[seriesName] || {};
var yAxis = DygraphOptions.axisToIndex_(optionsForSeries["axis"]);
for (var idx = 0; idx < this.labels.length; idx++) {
var seriesName = this.labels[idx];
var optionsForSeries = this.user_.series[seriesName] || {};
var yAxis = DygraphOptions.axisToIndex_(optionsForSeries["axis"]);