Advantages of AJAX

•       Real-time form data validation

Form data such as user IDs, serial numbers, postal codes, or even special coupon codes that require server-side validation can be validated in a form before the user submits a form.

•       Autocompletion

A specific portion of form data such as an email address, name, or city name may be autocompleted as the user types.

•       Load on demand

Based on a client event, an HTML page can fetch more data in the background, allowing the browser to load pages more quickly.

•       Sophisticated user interface controls and effects

Controls such as trees, menus, data tables, rich text editors, calendars, and progress bars allow for better user interaction and interaction with HTML pages, generally without requiring the user to reload the page.

•       Refreshing data and server push

HTML pages may poll data from a server for up-to-date data such as scores, stock quotes, weather, or application-specific data. A client may use Ajax techniques to get a set of current data without reloading a full page.

•       Partial submit

An HTML page can submit form data as needed without requiring a full page refresh.

•       Mashups

An HTML page can obtain data using a server-side proxy or by including an external script to mix external data with your application's or your service's data. For example, you can mix content or data from a third-party application such as Google Maps with your own application.

•       Page as an application

Ajax techniques can be made to create single-page applications that look and feel much like a desktop application.