Rhino object returns for native JS objects?

[tigerfoot]

Hello,

What object can I cast this to?

foo = jsEngine.asInstanceOf[Invocable].invokeFunction("go")

Where the scripted body of the go() function returns
{a:'A',b:'B',c:'C'}

I get errors about sun.org.mozilla.javascript.internal.NativeObject.

Can I cast this to something useful in Java so I can get to properties
a, b, and c?

Thanks,
Greg