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Callbacks and Ajax

You've already seen how to let the server know what to do when it's finished: Set the onreadystatechange property of the XMLHttpRequest object to the name of the function to run. Then, when the server has processed the request, it will automatically call that function. You also don't need to worry about any parameters to that method. You'll start with a simple method like in Listing 12.

Callback Visit Site
Ajax - Sending a Request for Information

Now that our onreadystatechange property has a proper response-handling function, we can send our request. Sending a request is comprised of two steps:

  1. Specify the URL of server-side script that will be used in our Ajax application.
  2. Use the send function to send off the request.

Our simple PHP script, that we have yet to write, will be called "serverTime.php", so we can already do step 1. The URL is set using the open method, which takes three arguments. The second argument is the important one, as it is the URL of our PHP script.

Ajax Request Visit Site
How to Do the Ajax Thing with Oracle JDeveloper

Over Oracle Technology Network, there is an tutorial explaining on using Ajax in comination with the JDeveloper software. By the end of this how-to, you will have developed a Web page that reads its data from a servlet on the server, using a CSS style sheet to establish alternating background colors for the retrieved data rows. An input text field allows you to provide your input to the printed message. Download a complete Oracle JDeveloper 10.1.3 workspace here.

"Ajax" is a community acronym used by the software industry for a set of related Web browser technologies, which, in combination deliver the rich client user experience for Web applications. The promise of Ajax is to close the usability gap that currently exist between browser based web applications and existing client-server desktop applications. In this article you'll learn how to translate "hello world" into Ajax, going from simple to more advanced in small steps.

Oracle Visit Site
Using Dojo and JSON to Build Ajax Applications

"Ajax" is a buzzword that is gaining momentum and popularity. Applications such as Gmail and Google Suggest serve as massive advertisements for asynchronous JavaScript. As users gain familiarity and their expectations increase, the demand for such interfaces is rising.

In this article, I will show how to build Ajax-enabled applications using Dojo and JSON--two very different but complementary technologies that can significantly enhance the interface and usability of web applications. With the help of some simple examples, you will learn how to use Dojo and JSON to build Ajax applications. This article will also demonstrate how to create custom Dojo widgets by implementing the popular "autocomplete" feature for HTML text boxes.

Ajax Application Visit Site
AJAX Tutorial: A Tale of Two IFrames (or, How To Control Your Browsers History

This is a mini-tutorial on the black art of iframes and browser history, known to AJAX experts but rarely presented clearly.

An iframe is an internal frame that can point to and load up an arbitrary URL within your HTML page. Here is an example small iframe showing Google, right in this document:

AJAX Tutorial Visit Site
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