Raycast and Hit Problem

Hi Community,

I have a little Problem. First of all, I want to show you my little script

 #pragma strict
 
 
 var test : GameObject;
 
 function Start () {
 
 renderer.enabled = false;
 }
 
 function Update (){       
 var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
 var hit : RaycastHit;
  if (Physics.Raycast(ray, hit))
     {
      if(hit.collider.gameObject == test);          
         Debug.Log("Console Text");
      }
    }

So I have two Problems : First, if I place the script on a Camera, I have to add a Renderer. But I only want, that the 'test' Object can be used by the Raycast.

Second : If I'm floating with my mouse over the 'test' Object, the Debug Log is shown. I want, that the Log is only shown, if I'm hitting the Object.

At last, sorry for my bad English and thank you for help !