Hi Pradeep,
Which aspect of the project are you interested in getting involved in? There's Gladius, the game engine; CubicVR.js, the 3D engine; ammo.js, the physics engine; the joystick API; mouse lock API; and more.
Hop on IRC today and we can get you started. In the future, the wiki should have more data for you to do this sort of thing.
-Bobby