Pick-Up Object With Mouse Hold

I am trying to make my game so that you can look at an object, and if close enough, pick it up by holding mouse down. I have created an empty object and placed it where I want the held object to be.

I watched a tutorial that used one script. Here is the code I am Using. It is in JavaScript:

 var target : Transform;
  
 function Update () {
  
 }
  
 function OnMouseDown() {
  
         this.transform.position = target.position;
         this.transform.parent = GameObject.Find("FPSController (1)").transform;
 //      this.transform.parent = GameObject.Find("FirstPersonCharacter").transform;
        
     }
  
 function OnMouseUp() {
  
         this.transform.parent = GameObject.Find("FPSController (1)").transform;
         this.transform.parent = null;
     }

When I apply the script nothing happens. I walk over to the object and press the mouse button, but it does not respond to my mouse clicking.

It is worth noting that my pickUpTarget empty object is a child of FPSController but not of FirstPersonCharacter. I did this because I do not wan't the object moving up and down with the camera, just left and right.

Thanks