AddSeries with different X values

Hi,
I would like to present on the same ‘canvas’ different series, which cannot be represented by a table.
For example:

data1 = [ { sales:2.9, month:"1" }, { sales:3.5, month:"6" }, { sales:7.6, month:"12" } ];
And

data2 = [ { sales:3.9, month:"2" }, { sales:4.5, month:"7" }, { sales:5.6, month:"12" } ];
How can I do so?

You may load several datasets in a chart:

chart.parse(data1,“json”);
chart.parse(data2,“json”);