i have variable in camera controller script which is target :transform i want it to change as i click on objects.and be that the same gameobject's transform i clicked as target.what do i do?

//I would name it "Camera Controller"

var target : Transform;

var distance = 10.0;

var cameraSpeed = 5;

var xSpeed = 175.0;

var ySpeed = 75.0;

var yMinLimit = 20; //Lowest vertical angle in respect with the target.

var yMaxLimit = 80;

var minDistance = 5; //Min distance of the camera from the target

var maxDistance = 20;

private var x = 0.0;

private var y = 0.0;

@script AddComponentMenu("Camera-Control/Mouse Orbit")

function Start () {

 var angles = camera.eulerAngles;

 x = angles.y;

 y = angles.x;

 

 // Make the rigid body not change rotation

 if (rigidbody)

     rigidbody.freezeRotation = true;

}

function LateUpdate () {

 if (target && camera) {

 

//Zooming with mouse

 distance += Input.GetAxis("Mouse ScrollWheel")*distance;

 distance = Mathf.Clamp(distance, minDistance, maxDistance);

 

 //Detect mouse drag;

 if(Input.GetMouseButton(0)) {

 

     x += Input.GetAxis("Mouse X") * xSpeed * 0.02;

     y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;        

     }

     y = ClampAngle(y, yMinLimit, yMaxLimit);

            

     var rotation = Quaternion.Euler(y, x, 0);

     var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;

//When the target changed or moved, Move the camera smoothly with it.

cam.position = Vector3.Lerp (cam.position, position, cameraSpeed*Time.deltaTime);

     cam.rotation = rotation;

     //camera.LookAt(target);

     

     

 }

}

static function ClampAngle (angle : float, min : float, max : float) {

 if (angle < -360)

     angle += 360;

 if (angle > 360)

     angle -= 360;

 return Mathf.Clamp (angle, min, max);

}