There are tons of JS chart libraries out there, and it seems that every time I look for one, the landscape has significantly changed (outside of D3 and Raphael).

We don't have very advanced needs, just the ability to draw several charts on top of each other (a bar chart + a line on top), and some interactivity (hover to highlight + show data).

But mainly I wish to be able to customise it using what I know: HTML, CSS and some JS.

Any advice?