I by chrome->Inspect element->console get this error:
chrome->Inspect element->console
XMLHttpRequest cannot load. Origin is not allowed by Access-Control-Allow-Origi
I recommend you to read this: http://www.fbloggs.com/2010/07/09/how-to-access-cross-domain-data-with-ajax-using-jsonp-jquery-and-php/
It is very wel explained... the whole point is that you need to return your JSON in a callback-function way