unity 5 webgl rotate on click issue

hi guys

I seem to be having an issue with this script, in unity it works fine but once built it doesn't seem to work.

what its meant to do:
left click on screen allows you to rotate around a model

what its doing once built:
always rotating around model without click

Code (JavaScript):

1. var target : Transform;
2. var distance = 10.0;
3.  
4. var xSpeed = 250.0;
5. var ySpeed = 120.0;
6.  
7. var yMinLimit = -20;
8. var yMaxLimit = 80;
9.  
10. private var x = 0.0;
11. private var y = 0.0;
12.  
13. @script AddComponentMenu("Camera-Control/Mouse Orbit")
14.  
15. function Start () {
16.     var angles = transform.eulerAngles;
17.     x = angles.y;
18.     y = angles.x;
19.  
20.     // Make the rigid body not change rotation
21.        if (GetComponent.<Rigidbody>())
22.         GetComponent.<Rigidbody>().freezeRotation = true;
23. }
24.  
25. function LateUpdate () {
26.     if (target && Input.GetMouseButton(0)) {
27.         x += Input.GetAxis("Mouse X") * xSpeed * 0.02;
28.         y -= Input.GetAxis("Mouse Y") * ySpeed * 0.02;
29.        
30.          y = ClampAngle(y, yMinLimit, yMaxLimit);
31.                
32.         var rotation = Quaternion.Euler(y, x, 0);
33.         var position = rotation * Vector3(0.0, 0.0, -distance) + target.position;
34.        
35.         transform.rotation = rotation;
36.         transform.position = position;
37.     }
38. }
39.  
40. static function ClampAngle (angle : float, min : float, max : float) {
41.     if (angle < -360)
42.         angle += 360;
43.     if (angle > 360)
44.         angle -= 360;
45.     return Mathf.Clamp (angle, min, max);
46. }

has anyone come across this issue before?

Thanks

Ahmed