AJAX Tutorials

The History of AJAX

  • 2007-09-04
  • Comments
  • Emiley J
  • 2943

In the beginning, there was the World Wide Web. Compared with desktop applications, web applications were slow and clunky. People liked web applications anyway because they were conveniently available from anywhere, on any computer that had a browser. Then Microsoft created XMLHttpRequest in Internet Explorer 5, which let browser-side JavaScript communicate with the web server in the background without requiring the browser to display a new web page. That made it possible to develop more fluid and responsive web applications. Mozilla soon implemented XMLHttpRequest in its browsers, as did Apple (in the Safari browser) and Opera.
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To use or not to use AJAX

  • 2007-09-04
  • Comments
  • Emiley J
  • 2942

When you use Ajax techniques to update portions of a web page, the user gains responsiveness and fluidity. However, the user also loses the ability to bookmark and to use the browser's back button. Both of these drawbacks stem from the same fact: the URL does not change because the browser has not loaded a new page.
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How to Make an HTTP Request in AJAX

  • 2010-11-28
  • Comments
  • Ram Baskar
  • 2942

In order to make an HTTP request to the server using JavaScript, you need an instance of a class that provides you this functionality. Such a class was originally introduced in Internet Explorer as an ActiveX object, called XMLHTTP. Then Mozilla, Safari and other browsers followed, implementing an XMLHttpRequest class that supports the methods and properties of Microsoft's original ActiveX object.
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Handling the Server Response in AJAX

  • 2010-11-28
  • Comments
  • Ram Baskar
  • 2942

Remember that when you send the request, you provide the name of a JavaScript function that is designed to handle the response. eg:
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A complete sample program in AJAX

  • 2010-11-28
  • Comments
  • Ram Baskar
  • 2942

Here is a complete AJAX example with a simple HTTP request. Our JavaScript will request an HTML document, test.html, which contains the text "I'm a test." and then we'll alert() the contents of thetest.html file.
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XML vs JSON in AJAX

  • 2009-01-17
  • Comments
  • Emiley J.
  • 2943

If you are working with AJAX, you probably use either one of them or both of them. However there are pros and cons of using each of them. One major drawback of using XML is the speed. XML requires two tags for every data point. These additional data in transmission between the server and the client slows down the data exchange and wastes bandwidth.
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Related Tutorials

How to Make an HTTP Request in AJAX

Handling the Server Response in AJAX

A complete sample program in AJAX

XML vs JSON in AJAX

Creating JSON objects using Java in AJAX

The History of AJAX

To use or not to use AJAX

Archived Comments

1. Simple and straight to the point. Thank you.
View Tutorial          By: Barbara at 2008-03-21 10:02:47

2. i am getting d following error:-

Se

View Tutorial          By: nikitha at 2013-02-07 09:23:12

3. right to point.. thanks man
View Tutorial          By: manish at 2012-07-28 15:01:26

4. Hi Nithya,
yes you can do that see the tut

View Tutorial          By: Ramlak at 2009-03-04 01:20:01

5. nice tutorial man !
View Tutorial          By: yash at 2012-11-10 05:08:31

6. Great guide. Missed the lecture, and this summed e
View Tutorial          By: Anonymous at 2008-12-21 19:36:19

7. Thank you! Solved many headaches :)
View Tutorial          By: Dominik at 2013-07-30 16:51:46

8. Thanks. Helped me save few hours
View Tutorial          By: Balan at 2008-04-07 18:25:08

9. Hi Rushabh, this only means that your port is not
View Tutorial          By: Ramlak at 2011-01-14 21:59:39

10. i found this tutorial very useful... i need to kno
View Tutorial          By: Anonymous at 2009-04-14 21:09:20