>The only exceptions to the foregoing are scripts and code downloaded and run by Apple's built-in WebKit framework or JavascriptCore, provided that such scripts and code do not change the primary purpose of the Application by providing features or functionality that are inconsistent with the intended and advertised purpose of the Application as submitted to the App Store.

It looks like this says "If you use download code that is run on JavaScript core (ie, JavaScript), then you can do this so long as you don't change the purpose of your app when you submitted it to the App Store."