Ajax For Dummies by Steve Holzner

By Steve Holzner

Ajax is brief for “Asynchronous JavaScript+CSS+DOM+XMLHttpRequest.”
Even in the event you weren’t intimidated prior to, that tidbit is maybe adequate to make you succeed in for the Excedrin. simply achieve for Ajax For Dummies in its place. With display photographs, real code and factors, and dwell sites the place you will see Ajax purposes doing their factor, it is going to have you ever utilizing Ajax to create internet functions that glance an act like laptop purposes very quickly. With Ajax, you could accelerate and freshen up your internet purposes. consumers at your on-line shop can fill their carts with out anticipating a number of web page refreshes. Searchers in your websites can get quick effects at the related page.
This consultant takes you on a travel of the way Ajax is used this day, entire with examples of Ajax purposes in motion, corresponding to an Ajax-enabled Yahoo! seek or an Ajax-based chat software. Then it offers fundamentals on utilizing JavaScript. After that you simply dive in and get details on:* Writing a few Ajax, interactive mouseovers utilizing Ajax, passing facts to the server with GET or put up, and extra* Connecting to Google for a stay seek* utilizing unfastened Ajax frameworks so that you don’t need to commence from scratch, together with Ajax Gold (written in particular for this book), AJAXLib, and grabbing XML with libXmlRequest* all types of Ajax options, akin to utilizing Ajax for drag-and-drop operations, pop-up menus, downloading photos backstage, and extra* utilizing SACK (simple AJAX code kit), deciphering XML with Sarissa, and developing visible results with Rico* dealing with XML int Ajax functions* operating with cascading kind sheets (CCS) in Ajax, together with developing the kinds, showing a menu, styling textual content, dealing with colours and backgrounds, and extra* operating with Ajax and PHP
Complete with a significant other site, loose Ajax frameworks, and pattern code you should use, Ajax for Dummies is your pleasant consultant to making really hassle-free internet sites!
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Sure. html, at work in Figure 2-11. Perfect. This is a technique that Ajax applications use frequently — after you’ve used Ajax techniques to fetch data from the server, you can display that data in a

element. Figure 2-11: Writing to a

element. write(“You’re using JavaScript”). You can also pass data to the functions you write. Here’s how to do it: Say that you want to pass the text to write to the displayText function. It’s easy; when you call the function, just pass the text you want to write in the parentheses following the name of the function, like this: displayText(‘You’re using JavaScript’).

Besides just storing data on the server, you might want to put code on the server that your JavaScript can interact with. For example, a popular server-side language is PHP, and many of the examples in this book show how you can connect to PHP scripts on Web servers by using Ajax. ) So you’re going to need a Web server to store your data on, and if you want to run server-side programs as well, your server has to support server-side coding for the language you want to work with (such as PHP). What Can You Do with Ajax?

Chatting with friends Because Ajax excels at updating Web pages without refreshing the displayed page, it’s a great choice for Web-based chat programs, where many users can chat together at the same time. com/ projects/chat, for example, which you can see in Figure 1-4. Here, you just enter your text and click the Submit button to send that text to the server. All the while, you can see everyone else currently chatting — no page refresh needed. Chapter 1: Ajax 101 Figure 1-4: An Ajaxbased chat application.

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