plotting using Javascript

I would like to know if it is possible to generate a plot on my webpage.

After googling, I found some useful charting tools, but none of them satisfied my need.

My aim is to plot a curve, say y^2 = x^3 +x.

I can, for instance, find a huge number of points on that curve and use the line chart, but I was wondering If I can do something better.

Note that I don't mind if the plot was done using php for example and then transferred to the client.

Thank you