Ajax Tutorials for beginner

Ajax is not a programming language or a tool, but a concept. Ajax is a client-side script that communicates to and from a server/database without the way for a post back or a make a get of page refresh. The best definition I've gate for Ajax is the method of exchanging data when a server, and updating parts of a web page - without reloading every page. Ajax itself is mostly a generic term for various JavaScript techniques used to be neighboring to to a web server dynamically without necessarily loading merger pages. In a more narrowly-defined sense, it refers to the use of Xml, Http, Request objects to interact with a web server dynamically via JavaScript.
In simple, Ajax is not a single technology, but a group of technologies. HTML and CSS can be used in combination to mark up and style information. The DOM is accessed with JavaScript to dynamically display – and allow the user to interact with – the information presented.