Disable Key Using Javascript

I am trying to make a game where certain controls cannot be used while using certain cameras. To do this, I need to disable the W and S keys when using one camera, and disable the A and D keys while using another. Is there a script I can use for this (in JavaScript)?

This is the code I am using to change the camera:

  if (Input.GetKeyDown("e"))
  {
      if (change == false)
      {
          change = true;
          cam1.enabled = true;
          cam2.enabled = false;
      }
      else
      {
          change = false;
          cam1.enabled = false;
          cam2.enabled = true;
      }
  }

Thanks