Cube detecting face click

[viki]

Hi Dean,

I have managed to build up on the textured cube example to display 6
different images on cube face.
Now, on clicking any of the cube faces, I want to get that particular
face in front & stop.

I have looked around in your code but to no avail.
Any ideas!

http://deanm.github.com/pre3d/demos/loader.html#textured_cube.js