little helpt with a chrome app

I am looking for assistance with my Chrome app. The specific help I need is finding the right format to extract information with my app, as it already works. I have the source code for my Chrome app. The app finds information on a site and then downloads that information into a database. All works well. What i like is to extracts some extra fields. They are upload to the database as well. fields and database are ready, but i need the right format to extract that parts of the website by the app. Other parts are working great. I just need some extra field formats to it gets the right info and puts it in the [login to view URL] again, the app already does what it need to do, just some extra fields to extract.