How to use this Camera

Questions & Answers
1

I have this code,but i don't know what to do with him.... Does i need to put java scrript in main camera or what??? Help pleaseeeeeee :(

var target : Transform;
var distance = 10.0;

var xSpeed = 250.0;
var ySpeed = 120.0;

var yMinLimit = -20;
var yMaxLimit = 80;

var distanceMin = 3;
var distanceMax = 15;

private var x = 0.0;
private var y = 0.0;

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

function Start () {
    var angles = transform.eulerAngles;
    x = angles.y;
    y = angles.x;

    // Make the rigid body not change rotation
    if (rigidbody)
        rigidbody.freezeRotation = false;
}

function LateUpdate () {

    if (target) {

   if(Input.GetKey("mouse 1")){
      Screen.showCursor = false;
      x += Input.GetAxis("Mouse X") * xSpeed * distance* 0.02;
        y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;
   }else{
   Screen.showCursor = true;
   }
       y = ClampAngle(y, yMinLimit, yMaxLimit);

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

        distance = Mathf.Clamp(distance - Input.GetAxis("Mouse ScrollWheel")*5, distanceMin, distanceMax);

        var hit : RaycastHit;
        if (Physics.Linecast (target.position, transform.position, hit)) {
                distance -=  hit.distance;
        }

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

        transform.rotation = rotation;
        transform.position = position;

    }
}

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);
}`
2

Yes, you put it on the main camera, and then drag the object you want to look at into the target variable in the inspector for the script