How can I change this C# code into Javascript?

I'm pretty new to Unity and I'm trying to convert the following code into Javascript (it's currently C#) so I can understand it. Can someone help me out?

using UnityEngine; using System.Collections;

public class CarControl : MonoBehaviour

{

 public GameObject RightWheel;
 public GameObject LeftWheel;

 void Start()
 {
     Vector3 center = rigidbody.centerOfMass; 
     center.y -= 1;
     rigidbody.centerOfMass = center;
 }

 void FixedUpdate ()
 {
     float h = Input.GetAxisRaw("Horizontal");

     JointMotor motor = LeftWheel.hingeJoint.motor;
     motor.force = (h!=0?1:0) * 30;
     motor.freeSpin = true;
     motor.targetVelocity = -h * 4000;

     LeftWheel.hingeJoint.useMotor = h != 0;
     LeftWheel.hingeJoint.motor = motor;

     RightWheel.hingeJoint.useMotor = h != 0;
     RightWheel.hingeJoint.motor = motor;

     rigidbody.AddRelativeTorque(0, 0, -h * 3000);


     // flip the car
     if (Input.GetButton("Fire1"))
     {
         float deltaAngle = Mathf.DeltaAngle(transform.eulerAngles.z, 0);
         if (Mathf.Abs(deltaAngle) > 10)
         {
             rigidbody.AddTorque(0, 0, deltaAngle * deltaAngle * deltaAngle, ForceMode.VelocityChange);
         }
     }
 }

}