How to I play an animation using the Animation Element Array via Script?

How to I play an animation using the Animation Elements via Script?

Example: gameObject.transform.parent.animation.Play("AssaultRifleRecoil");

The animation "AssaultRifleRecoil" is in Element 2 in the animation component of the game object.

Is there a way to type the above line of code using the Element Number as opposed to writing the actual string name of the animation?

Example:

    gameObject.transform.parent.animation.Play[2];

The error I get is:

   Assets/Scripts/AssaultRifleScript.js(174,59): BCE0055: Internal compiler error:    Array index is out of range..

But it is obvious not out of range considering that the Element array is all filled with animations up to Element 5

What am I doing wrong?