Why do we use the XMLHttpRequest object in AJAX?

[dennis123]

Why do we use the XMLHttpRequest object in AJAX?

[crackersguru]

Javascript uses the XMLHttpRequest object to manipulate XML and other text data between client and server.
- AJAX applications use the XMLHttpRequest object to avoid the postback of entire page when the browser is communicating with server.
- The XMLHttpRequest object enables a client-side script to execute an HTTP request.
- For this functionality MSXML ActiveX component is used in earlier version of Internet Explorer. While, XMLHttpRequest is used in Internet Explorer 7 and other browsers, such as Mozilla, Firefox.

[Softgrip]

The XMLHttpRequest object can be used to exchange data with a server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page.