Lerp certain variables in my script?

I have a script that makes my gun sway in my game when I move the camera. Here's the script...

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3.  
4. public class GunSway: MonoBehaviour {
5.     public float moveAmount = 1f;
6.     public float moveSpeed = 2f;
7.     public GameObject gun;
8.     private float moveOnX;
9.     private float moveOnY;
10.     public Vector3 defaultPosition;
11.     public Vector3 newGunPosition;
12.    
13.    
14.     // Use this for initialization
15.     void Start () {
16.        
17.     }
18.    
19.     // Update is called once per frame
20.     void Update () {
21.        
22.         moveOnX = Input.GetAxis("Mouse X") * Time.deltaTime * moveAmount;
23.        
24.         moveOnY = Input.GetAxis("Mouse Y") * Time.deltaTime * moveAmount;
25.        
26.         newGunPosition = new Vector3 (defaultPosition.x+moveOnX, defaultPosition.y+moveOnY, defaultPosition.z);
27.        
28.         gun.transform.localPosition = Vector3.Lerp(gun.transform.localPosition, newGunPosition, moveSpeed*Time.deltaTime);
29.        
30.     }
31.    
32.    
33. }
34.  

But, I want to make it so when you hold in right click, it will lerp these variables

defaultPosition: x = 0.465 changes to x = 0
defaultPostion: y = -0.397 changes to y = -0.355
moveAmount = 7 changes to 1

I have a script that can change certain variables in Javascript coding, but it won't work with this CSharp script. This is that code...

Code (JavaScript):

1. var NormalX: float = 0.8; // XOffset while not aiming
2. var AimX: float = 0.7; // XOffset while aiming
3. private var cameraScript: MouseOrbitOTS;
4. function Start(){
5.      cameraScript = GetComponent(MouseOrbitOTS);
6.      var ch:Camera = GetComponent(Camera);
7. }
8. function Update(){
9.      var cameraX = NormalX;
10.      if (Input.GetButton("Aim")){
11.          cameraX = AimX;
12.       }
13.       cameraScript.xOffset = cameraX; // set XOffset while aiming or not aiming
14. }

What could I do to get the outcome I want?