Help:Ajax

Ajax is an abbreviation for Asynchronous JavaScript and XML and mostly used to facilitate asynchronous communication with a server.

Semantic MediaWiki and Ajax
N/A

Communication
The Same origin policy can prevent objects that do not adhere the same origin (server address) to fail with the communication request. Messages such as XMLHttpRequest cannot load .... Origin ... is not allowed by Access-Control-Allow-Origin will suggest a failed request.

Note
This is a help landing page (fixed as Help:Ajax), if you change the page name please ensure a proper redirect.