The keystone of AJAX is the XMLHttpRequest object.
- Create an XMLHttpRequest object
- Define a callback function
- Open the XMLHttpRequest object
- Send a Request to a server
The XMLHttpRequest Object
All modern browsers support the XMLHttpRequest object.
The XMLHttpRequest object can be used to exchange data with a web server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page. Continue reading Javascript AJAX – The XMLHttpRequest Object