Just because I don't do enough silly things with JavaScript already (and a raytracer!), here are some 3d graphics done with just JavaScript. You should see a TIE fighter rotating, and moving left and right. Bolded options are recommended.
Rotation axis: Z Y X
Draw mode: Lines / Polygons Points
View style: Built in lines (fast) Manual Bresenham Filled polygons
Scene: Cube Mutually-overlapping triangles TIE fighter
Quality: 100%
See also my other 3d engine.