if (typeof(axis) == 'string') {
if (!this.series_.hasOwnProperty(axis)) {
- Dygraph.error("Series " + seriesName + " wants to share a y-axis with " +
+ console.error("Series " + seriesName + " wants to share a y-axis with " +
"series " + axis + ", which does not define its own axis.");
return;
}