calling a function from non attached other script

I have 2 scripts

c# ClothingManager.cs:

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 using System.Xml;
 
 public class ClothingManager {
   
     public List<GameObject> addedClothing = new List<GameObject>();
     

     public string [] clothing = {"Jacket", "Pants", "Dress"};
     
     public NiteController niteController;
     
     public ClothingManager(NiteController nc) {
         niteController = nc;
     }
     
     public void ToggleClothing(string clothingLabel) {
         Debug.Log("Toggling " + clothingLabel);
         Vector3 location;
         niteController.GetJointPosition(NiteWrapper.SkeletonJoint.TORSO_CENTER, out location);
         
         
         GameObject clothing = FindActiveClothing(clothingLabel);
         
         if (clothing == null) {
             clothing = Object.Instantiate(Resources.Load(clothingLabel), location, Quaternion.identity) as GameObject;
             clothing.name = clothingLabel;
             if (niteController.RegisterRig(clothing)) {
                 //Add clothing to list of worn clothing
                 addedClothing.Add(clothing);
             } else {
                 Object.Destroy(clothing);
                 Debug.LogWarning("Clothing rig not valid: " + clothingLabel);
             }
         } else {
             addedClothing.Remove(clothing);
             Object.Destroy(clothing);
         }

     }

and a javascript:

 var clothingManager         : ClothingManager;  
 
 
 function Awake()
 {
     clothingManager = gameObject.GetComponent(ClothingManager); //get the c#script
 }
 
 function Pants()
 {
     Debug.Log("blablablablabalb");
     clothingManager.ToggleClothing("Pants");
 }

When I call the funtion Pants I get a nullreferenceexception object reference not set to an instance of an object error

How can I solve this?