how to move the camera using the mouse scroll in all direction?

Hi Every One,

I am trying to do move the camera in the scene using the mouse scroll instead of the keyboard. I am using the MouseLook.cs unity default Script to rotate the object and i wrote the scrolling code in that its working, but it is moving the only one direction, it is taking the world position and moving even if i change the locval position it snot moving the direction.

i have attached the script below please check and tell me my bugs,

 using UnityEngine;
 using System.Collections;
 
 /// MouseLook rotates the transform based on the mouse delta.
 /// Minimum and Maximum values can be used to constrain the possible rotation
 
 /// To make an FPS style character:
 /// - Create a capsule.
 /// - Add the MouseLook script to the capsule.
 ///   -> Set the mouse look to use LookX. (You want to only turn character but not tilt it)
 /// - Add FPSInputController script to the capsule
 ///   -> A CharacterMotor and a CharacterController component will be automatically added.
 
 /// - Create a camera. Make the camera a child of the capsule. Reset it's transform.
 /// - Add a MouseLook script to the camera.
 ///   -> Set the mouse look to use LookY. (You want the camera to tilt up and down like a head. The character already turns.)
 [AddComponentMenu("Camera-Control/Mouse Look")]
 public class MouseLook : MonoBehaviour {
 
     public enum RotationAxes { MouseXAndY = 0, MouseX = 1, MouseY = 2 }
     public RotationAxes axes = RotationAxes.MouseXAndY;
     public float sensitivityX = 15F;
     public float sensitivityY = 15F;
 
     public float minimumX = -360F;
     public float maximumX = 360F;
 
     public float minimumY = -60F;
     public float maximumY = 60F;
 
     float rotationY = 0F;
 
     private float forw;
 
     private Vector3 position;
 
     void Update ()
     {
         if(!CameraControl.uienable)
         {
             if(Input.GetMouseButton(0))
                 {
                 if (axes == RotationAxes.MouseXAndY)
                 {
                     float rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivityX;
                     
                     rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
                     rotationY = Mathf.Clamp (rotationY, minimumY, maximumY);
                     
                     transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0);
                 }
                 else if (axes == RotationAxes.MouseX)
                 {
                     transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityX, 0);
                 }
                 else
                 {
                     rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
                     rotationY = Mathf.Clamp (rotationY, minimumY, maximumY);
                     
                     transform.localEulerAngles = new Vector3(-rotationY, transform.localEulerAngles.y, 0);
                 }
             }
 
 //            forw -= Input.GetAxis("Mouse ScrollWheel") * Time.deltaTime * 20;
 //
 //            position = new Vector3(forw, transform.position.y, forw);
 //
 //            transform.localPosition = position;
         }
     }
     
     void Start ()
     {
         forw = transform.position.z;
 
         // Make the rigid body not change rotation
         if (rigidbody)
             rigidbody.freezeRotation = true;
     }
 }

This is my code.

Thanks.