How do I take the MouseOrbit script and apply that to a button?

I’d like to take the MouseOrbit.js and apply it to a button, so when I click and hold a button it will activate the script. I’m really new to scripting so I’m not sure what needs to be altered.

Here is the button code:

function OnGUI () {
if (GUI.RepeatButton (Rect (10,130,90,70), “Spin”)) {
}
}

And here is the original MouseOrbit.js:

var target : Transform;
var distance = 10.0;

var xSpeed = 250.0;
var ySpeed = 120.0;

var yMinLimit = -20;
var yMaxLimit = 80;

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 = true;
}

function LateUpdate () {
if (target) {
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;

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);
}

I think somehow I need to combine this:

function OnGUI () {
if (GUI.RepeatButton (Rect (10,130,90,70), “Spin”)) {

with this:

function LateUpdate () {
if (target) {
x += Input.GetAxis(“Mouse X”) * xSpeed * 0.02;
y -= Input.GetAxis(“Mouse Y”) * ySpeed * 0.02;

One is an OnGUI and the other is a LateUpdate. Can they be combined?