Using a variable from one javascript in another javascript?

I have one Javascript named java1.js

public var dog : int = 0;

java1.js is attached to the game object main camera.

Then the value of dog is changed by a controller input somewhere between 0-100.

Now I have a second Javascript named java2.js

How do I access the changing value of dog from java1.js in java2.js

So I can make a new variable cat = dog

?

See the docs about accessing other game objects.