Json issues with javascript and jquery. Trying to load some JSON using javascript.
I have it working using:
See it here: http://jsfiddle.net/5pjha/789/
I believe the issue is down to whether or not the servers you are requesting your JSON from have cross-origin resource sharing (CORS) enabled.
you can see in the headers from the google service that they set Access-Control-Allow-Origin:*
This is not the case for teh other URL's you list.
To get around this you will need some form of proxy so that you can request from a server either on the same domain or a server that enables CORS.