Enable/Disable JS Script Problem (AR) using CS

Thanks for answer, but i still have an error message :(

"Assets/Qualcomm Augmented Reality/Scripts/DefaultTrackableEventHandler.cs(32,49): error CS0103: The name `findObjectOfType' does not exist in the current context"

add this header using System.Collections; and did u place script in plugins folder and it is FindObjectOfType not findObjectOfType the starting letter should be capital

ok can i see what are you calling in start function and also try your default code once i.e jsScript = GetComponent(); and check both conditions once.

Sorry its work, but how to disable/enable my GUImenuTEST.js ? I mean, how to if i want to disable my Button Script (GUImenuTEST.js) if start running, and then will enable when TrackingFound, and disable again when TrackingLost ?

 using UnityEngine;
 using System.Collections;
 
 public class DefaultTrackableEventHandler : $$anonymous$$onoBehaviour,
                                             ITrackableEventHandler
 {
     private TrackableBehaviour mTrackableBehaviour;
     
     private GUImenuTEST jsScript;
     
     void Start()
     {
         jsScript = GetComponent<GUImenuTEST>();
         
         mTrackableBehaviour = GetComponent<TrackableBehaviour>();
         if (mTrackableBehaviour)
         {
             mTrackableBehaviour.RegisterTrackableEventHandler(this);
         }
         
     }
 
     public void OnTrackableStateChanged(
                                     TrackableBehaviour.Status previousStatus,
                                     TrackableBehaviour.Status newStatus)
     {
         if (newStatus == TrackableBehaviour.Status.DETECTED ||
             newStatus == TrackableBehaviour.Status.TRAC$$anonymous$$ED ||
             newStatus == TrackableBehaviour.Status.EXTENDED_TRAC$$anonymous$$ED)
         {
             OnTrackingFound();
             jsScript = (GUImenuTEST)FindObjectOfType(typeof(GUImenuTEST)); 
         }
         else
         {
             OnTrackingLost();
         }
     }
 
     private void OnTrackingFound()
     {
         Renderer[] rendererComponents = GetComponentsInChildren<Renderer>(true);
         Collider[] colliderComponents = GetComponentsInChildren<Collider>(true);
     
         foreach (Renderer component in rendererComponents)
         {
             component.enabled = true;
         }
 
         foreach (Collider component in colliderComponents)
         {
             component.enabled = true;
         }
 
         Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " found");
     }
 
     private void OnTrackingLost()
     {
         Renderer[] rendererComponents = GetComponentsInChildren<Renderer>(true);
         Collider[] colliderComponents = GetComponentsInChildren<Collider>(true);
         
         foreach (Renderer component in rendererComponents)
         {
             component.enabled = false;
         }
 
         foreach (Collider component in colliderComponents)
         {
             component.enabled = false;
         }
         
         Debug.Log("Trackable " + mTrackableBehaviour.TrackableName + " lost");
     }
 
 }