Posting comments via mobile app

Does anyone have any example code for commenting on blog post from a mobile app?

I have successfully used json to add comment in browser using the following format:

http://my_site/?json=respond.submit_comment&post_id=?&name=?&email=?&content=?&nonce=?

…..but, what would I use for the javascript?

Any idea?

thank

http://wordpress.org/plugins/json-api/