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Already an experienced Web developer? Apply your skills in today's fastest-growing area of Web development: AJAX!Building on what you already know, this fast-paced guide will show you exactly how to create rich, usable Internet applications. Joshua Eichorn teaches through sophisticated code examples, including extensive server-side PHP code.You won't just learn how to code AJAX applications: Eichorn covers the entire development lifecycle, from use cases and design through debugging. He also presents detailed application case studies, including a start-to-finish update of a non-AJAX application that addresses everything from feature improvements to changing usage patterns. Coverage includes:· How AJAX changes the conventional Web development cycle· Problems created by the AJAX paradigm - and how to avoid them· Adding AJAX to existing Web applications: key considerations· Using core AJAX technologies, including the XMLHttpRequest object· Consuming data returned to an AJAX application using both XSLT and JSON· Building more usable AJAX applications: guidelines and downloadable resources· Use cases: solving real-world problems in the AJAX environment· Libraries and toolkits for simplifying AJAX development, including Sarissa, scriptaculous, and HTML_AJAX· A complete guide to AJAX debugging· Supporting browsers without XMLHttpRequest by using IFrames or cookies· JSON data encoding debugging guide, which covers tools for Firefox and Internet Explorer· A list of libraries, which includes PHP, .NET, Java, and other libraries that can be used with any server language