I think , i don't really understand what do you want! Container 1 and 2 are two distincts objects, so what do you meaning by "simultaneous selection"? Or you have imbricated your two container? Please, attach some screenshots!
Thanks for your response, There is no connection between two containers. I am showing seperate graphs on both the containers. It is just that when i click on any tab of one container, eventually graphs of other container disappear; vice versa.