It's worth noting that it's against the Google Visualization terms of service to self-host the javascript. It's not a big deal if you need the pure JS stuff, b

It's worth noting that it's against the Google Visualization terms of service to self-host the javascript. It's not a big deal if you need the pure JS stuff, but anything which generates images is sending the data to google's servers. Be careful exactly what you're using if you're displaying sensitive data.