turning off mouselook isnt working

hi any idea why this isnt working? all like 50 examples ive looked at use this method and all it says for me is

Assets/EnableandDisableMouse.cs(27,51): error CS1061: Type UnityEngine.Component' does not contain a definition for enabled’ and no extension method enabled' of type UnityEngine.Component’ could be found (are you missing a using directive or an assembly reference?)

using UnityEngine;
using System.Collections;

public class EnableandDisableMouse : MonoBehaviour {
	public bool onoroff = true;
	// Use this for initialization
	void Start () {
	
	}
	
	// Update is called once per frame
	void Update () 
	{
		if(Input.GetKeyDown(KeyCode.Tab))
		{
			onoroff = !onoroff;
		}


		if (onoroff == true)
		{
			Screen.showCursor = false;
		}
		if (onoroff == false)
		{
			Screen.showCursor = true;
			GetComponent("MouseLook").enabled = false;
		}
	}
}

Updated the script but now the mouse look on the camera wont shut off any ideas?

using UnityEngine;
using System.Collections;

public class EnableandDisableMouse : MonoBehaviour {
	public bool onoroff = true;
	MouseLook playerLook;
	MouseLook playerCameraLook;
	// Use this for initialization
	void Start ()
	{
		playerLook = (MouseLook)GameObject.Find ("PlayerController").GetComponent ("MouseLook");
		playerCameraLook = (MouseLook)GameObject.Find ("Main Camera").GetComponent ("MouseLook");	
	}
	
	// Update is called once per frame
	void Update () 
	{
		if(Input.GetKeyDown(KeyCode.Tab))
		{
			onoroff = !onoroff;
			playerLook.enabled = !playerLook.enabled;
			playerCameraLook.enabled = !playerCameraLook.enabled;
		}
		
		
		if (onoroff == true)
		{
			Screen.showCursor = false;
		}
		if (onoroff == false)
		{
			Screen.showCursor = true;
		}
	}
}

Your get key down is calling every frame, use GetKeyUp to only call once.

        // Update is called once per frame
        void Update () 
        {
            if(Input.GetKeyUp(KeyCode.Tab))
            { 
                onoroff = !onoroff;
                ToggleMouse();
            }
     }
     void ToggleMouse(){
           if (onoroff == true)
            {
                Screen.showCursor = false;
            }
            else
            {
                Screen.showCursor = true;
                GetComponent("MouseLook").enabled = false;
            }
        }
    }

You are using GetComponent wrong. It requires a typeof. Like this:

GetComponnent<MouseLook>().enabled = false;