Control camera target from another scripts

Hey guys, I've been looking at other scripts and I swear this should work but it doesn't:

 var target_ball : Rigidbody;
 static var game_state : int = 2;

 function Awake()
 {
    DontDestroyOnLoad (transform.gameObject);
 }

 function OnGUI()
 {
   switch(game_state)
   {
     case 2: // SET THROW
     if(!gameObject.Find("Ball"))
     {
       var target = Instantiate(target_ball, Vector3(10, 5.2, 3.75), Quaternion.identity);
       target.name = "Ball";
       GameObject.Find("Main Camera").GetComponent("SmoothLookAt").target = target;
     }
   }
 }

The camera has SmoothLookAt.js with var target : Transform;

The error reads: BCE0019: 'target' is not a member of 'UnityEngine.Component'.

How do I change the target of the camera from this script?