Beginner

Adobe

An Absolute Beginner's Tutorial On Flex 3 [Flash Tutorials] With Web users expecting richer and more complex interfaces, Rich Internet Applications (RIAs) are seeing a huge increase in popularity.

Adobe Flex is the tool of choice for many web developers when it comes to building RIAs. Flex used to be one of those technologies that was only used by large corporate organisations — the first release of Flex was priced at around US$15,000 per CPU (a tad expensive for most developers) Since then, Flex has been released as open source software. Talk about a complete turnaround! Flex is now in version 3.0, and runs on the Adobe Flash Player 9 runtime. Flex 3.0 has been such a success that Flex 4.0 has been announced for release in 2009.

Developers are picking up Flex with great speed. Another drawcard is that Flex applications can be developed to run on a user’s desktop thanks to the wonders of the Adobe AIR (Adobe Integrated Runtime) platform. That’s enough rambling; let’s learn the basics of what Flex is all about. Why Use Flex? <! How to Develop Web Applications with Ajax: Part 1. In the past, web applications were limited because a web page had to be reloaded (or another page loaded in its place) in order for new data to be obtained.

Other methods were available (without loading another page), but the techniques weren’t well supported and had a tendency to be buggy. In recent months, a technique that had not been widely supported in the past has become available to a large number of web surfers, giving developers more freedom to develop cutting-edge web applications. These applications, which asynchronously retrieve XML data via JavaScript, are affectionately known as “Ajax applications” (Asynchronous Javascript and XML applications). In this article, I will explain how to retrieve a remote XML file via Ajax to update a web page, and as this series continues, I will discuss more ways that Ajax technology can be used to take your web applications to the next level.

The first step is to create an XML file with some data. Next is this block: Take Command with Ajax [JavaScript &amp; AJAX Tutorials] Do you want to build more dynamic, responsive, desktop-like web applications like Gmail and Google Maps?

Then this article is for you! It guides you through the Ajax basics and through the process of building a simple Ajax application. That application is named WebConsole, a browser interface for executing system commands for which you’d usually need shell access. There are also short examples of using the Ajax functionality of two popular JavaScript libraries – jQuery and YUI. In this article, first published in 2005 and recently updated, I’ll explain the creation of one simple, reusable JavaScript function for making HTTP requests. Although there are some YUI and jQuery examples, the article is not a tutorial on a specific Ajax library. A Simple HTTP Request Example Let’s first revise the flow of making an HTTP request in JavaScript, and handling the response. There are three basic steps: Create an XMLHttpRequest object. <button id="mybutton">Make a request</button> The Problem if (! <?