Camera re-target

Hi, everyone

Is there a script that when I click a certain object, the object should become new target of camera each time i click.

i am using this code for camera.

 //WASD to orbit, left Ctrl/Alt to zoom
 using UnityEngine;
 using System.Collections;
 
 [AddComponentMenu("Camera-Control/Keyboard Orbit")]
 
 public class Guikeys : MonoBehaviour {
     public Transform target;
     public float distance = 20.0f;
     public float zoomSpd = 2.0f;
 
     public float xSpeed = 240.0f;
     public float ySpeed = 123.0f;
 
     public int yMinLimit = -723;
     public int yMaxLimit = 877;
 
     private float x = 0.0f;
     private float y = 0.0f;
     
     private float GUIHorizontal = 0;
     private float GUIVertical = 0;
     
     public Texture uptexture;
     public Texture lefttexture;
     public Texture righttexture;
     public Texture downtexture;
     
     public void Start () {
         Vector3 angles = transform.eulerAngles;
         x = angles.y;
         y = angles.x;
 
         // Make the rigid body not change rotation
         if (rigidbody)
             rigidbody.freezeRotation = true;
     }
 
     
     
 void OnGUI()
 {
     if(Event.current.type == EventType.Repaint)
     {
         GUIHorizontal = 0;
         GUIVertical = 0;
     }
     GUILayout.BeginVertical();
     if(GUI.RepeatButton(new Rect(70,600,30,30), uptexture))
     {
         GUIVertical = 1;
     }
     GUILayout.BeginHorizontal();
     if(GUI.RepeatButton(new Rect(35, 630, 30, 30), lefttexture))
     {
         GUIHorizontal = -1;
     }
     if(GUI.RepeatButton(new Rect(103, 630, 30, 30), righttexture))
     {
         GUIHorizontal = 1;
     }
     GUILayout.EndHorizontal();
     if(GUI.RepeatButton(new Rect(70, 658, 30, 30), downtexture))
     {
         GUIVertical = -1;
     }
     GUILayout.EndVertical();
 }
 
 
     public void LateUpdate () {
         if (target) {
             
             
             x -= Input.GetAxis("Horizontal") * xSpeed * 0.02f;
             y += Input.GetAxis("Vertical") * ySpeed * 0.02f;
             
             
             x -= GUIHorizontal * xSpeed * 0.02f;
             y += GUIVertical * ySpeed * 0.02f;
             
             y = ClampAngle(y, yMinLimit, yMaxLimit);
             
         distance -= Input.GetAxis("Fire1") *zoomSpd* 0.02f;
             distance += Input.GetAxis("Fire2") *zoomSpd* 0.02f;
             
             Quaternion rotation = Quaternion.Euler(y, x, 0.0f);
             Vector3 position = rotation * new Vector3(0.0f, 0.0f, -distance) + target.position;
             
             transform.rotation = rotation;
             transform.position = position;
         }
     }
 
     public static float ClampAngle (float angle, float min, float max) {
         if (angle < -360.0f)
             angle += 360.0f;
         if (angle > 360.0f)
             angle -= 360.0f;
         return Mathf.Clamp (angle, min, max);
         
     
     }
 }

Thanx