Javascript drawing library?

Any suggestion for a JavaScript interactive drawing library? Just need to draw lines, polygons, texts of different colors. IE/Firefox/Opera/Safari compatible. ­­­­­­­­­­­­­­­­­­­­­­­­­­

Raphael is pretty cool for that, and works across browsers since it uses VML (for MSIE) and SVG (for everything else).

John Resig's Processing.js is a nice framework for that.