Mr. Juan,
Thank you very much for your snipped code. It is very helpfull to me. In your snipped code, there are 3 series at the chart that loaded at first time the chart loaded. With onClick button event, we can choice one series from 3 series to visible.
If I want to add/subtract series by selected item event from dropdownlist, could you give to me any snipped code to do it?
Thanks.
Sri