Ajax requests are only possible when the protocol, domain and port number are the same. But sometimes you want to do Ajax calls to a different domain for example when you are creating a shared service that people should be able to call using Ajax or when you are developing locally and you are testing on a remote server. There are multiple ways to get around this restriction for example by using CORS, an iFrame or JSONP. In my last project I got around the restriction using JSONP, so I will explain that here. See links for more information about solving it using CORS.