What is AJAX? AJAX stands for Asynchronous JavaScript And XML. The XMLHttpRequest object present in the modern browsers helps us to create a GET or POST request asynchronously and enables us to register a callback function that gets called when a response returns from the request. The response can be in the form of a responseText or responseXML. When the response is of a text form we can just use it to display it in the browser or if it is in XML format parse the XML and display it in the browser. The following article contains a simple example to explain the above description.