Add construction of Counter from Java

        // and prototype in JavaScript.

        ScriptableObject.defineClass(scope, Counter.class);

        // Create an instance of Counter and assign it to

        // the top-level variable "myCounter". This is

        // equivalent to the JavaScript code 

        //    myCounter = new Counter(7);

        Object[] arg = { new Integer(7) };

        Scriptable myCounter = cx.newObject(scope, "Counter", arg);

        scope.put("myCounter", scope, myCounter);

        String s = "";

        for (int i=0; i < args.length; i++)

            s += args[i];