JXA: Access to constants/variables in a loaded script.

I have two scripts: A loads B as scriptB.

B has a variable defined as follows (with or without var): PAD_LEFT = 1;

From script A I can access a function in script B:

scriptB.myfunc(1); This works.

scriptB.myfunc(PAD_LEFT); - PAD_LEFT not defined (OK)

scriptB.myfunc(scriptB.PAD_LEFT) runs but what is passed to the function is '[object Object]'.

Is it possible to access global variables defined in a loaded script?

Thanks,

Craig.