Disabling Scripts

Hi everyone.

I'm trying to disable the Mouse Look script on a game I'm making for the user can use a GUI. The problem I'm having is that when I type this script up it keeps giving me an error saying the MouseLook is an unknown identifier. I did get this code from the internet but it seemed to work for the person who posted it. The Mouse Look script is on a own made player model it isn't on the First Person Prefab that comes with Unity.

If anyone could help that would be awsome :).

 var Dialog : boolean = true;
 
 function Start () {
 
 }
 
 function Update () {
 
     if(Input.GetKeyUp(KeyCode.F) && Dialog )
     {
         GetComponent(MouseLook).enabled = false;
         Dialog = false;
     }
     else if (Input.GetKeyUp(KeyCode.F) && Dialog == false)
     {
         GetComponent(MouseLook).enabled = true;
         Dialog = true;
     }
 }