Need to learn JavaScript fast? This best-selling, task-based, visual reference guide has been fully revised and updated for the seventh edition. It uses step-by-step instructions and plenty of screenshots to give beginning and intermediate Web designers and Web developers what they need to know to learn JavaScript and Ajax in no time. Whether you start from the beginning to get a tour of the programming language, or look up specific tasks to learn just what you need to know, leading Web and computing experts Tom Negrino and Dori Smith use crystal-clear instructions and friendly prose to introduce you to all of today's JavaScript essentials. You'll find new information on modern coding techniques including designing Ajax-based sites. Along the way, you'll find extensive coverage of Ajax techniques, JavaScript frameworks (including jQuery and Yahoo's User Interface Library) and current browsers (IE, Safari, Firefox). The companion Web site at www.javascriptworld.com offers sample scripts, updates, and more!