"AJAX = Asynchronous JavaScript and XML. AJAX is a technique for creating fast and dynamic web pages. AJAX allows web pages to be updated asynchronously by exchanging small amounts of data with the server behind the scenes. This means that it is possible to update parts of a web page, without reloading the whole page. Classic web pages, (which do not use AJAX) must reload the entire page if the content should change.

1. AJAX
Abhilasha Lahigude.

2. WHAT IS AJAX?
 "AJAX = Asynchronous JavaScript and XML.
 AJAX is a technique for creating fast and
dynamic web pages.
 AJAX allows web pages to be updated
asynchronously by exchanging small amounts
of data with the server behind the scenes. This
means that it is possible to update parts of a
web page, without reloading the whole page.
 Classic web pages, (which do not use AJAX)
must reload the entire page if the content
should change.

3. WHY USE AJAX?
Very user-visible effect
 Rich UI experience in a Web page
 Portable across browsers
 Plus, all advantages of zero-install Web app
 Ajax Apps:
 Dynamic data
 Static or dynamic forms, controls, code, etc.
 Best of both worlds

4. CLASSIC VS AJAX

5. SOME EXAMPLES
Login forms Google Suggest
Chat Rooms And Instant Messaging Lightboxes instead of pop-ups

6. HOW AJAX WORKS

7. HOW TO USE AJAX?
The typical method for using Ajax is the following:
 A JavaScript creates an XMLHttpRequest object,
initializes it with relevant information as necessary, and
sends it to the server. The script (or web page) can
continue after sending it to the server.
 The server responds by sending the contents of a file or
the output of a server side program (written, for
example, in PHP).
 When the response arrives from the server, a JavaScript
function is triggered to act on the data supplied by the
server.
 This JavaScript response function typically refreshes the
display using the DOM, avoiding the requirement to
reload or refresh the entire page.

8. WE IMPLEMENTED
 The following example will demonstrate how a web page can communicate
with a web server while a user type characters in an input field:

9. 1. HTML & CSS
- User interface
- Input from user
- Display output
- To style the data
3. JavaScript
-creates an
XMLHttpRequest
object
-initializes it
-sends it to the
server
-interact with the
information
2. PHP
-saved on server
-generate xml
-send to clients
computer
-communication
between JS and
server
-transferring data

10. HTML

11. PHP

12. JAVASCRIPT

13. THANK YOU