Getting data via JavaScript

[Alan]

Hello,

Currently the JSON data is inaccessible to JavaScript running in a
browser.

The JSON being served up must either support JSONP or CORS for JS code
to retrieve it, and the JSON data currently being served up (e.g.
http://developer.mbta.com/lib/RTCR/RailLine_9.json) appears to support
neither.

Am I missing something?

Thanks,
alan