Using proven examples and explaining concepts step by step, this book shows you how building Ajax-enabled sites and applications allows more interactive user interfaces than ever before. You'll learn about the differences in capabilities between client-side and server-side development techniques, as well as how Ajax crosses this boundary. You'll also discover how Ajax techniques can be summed up by patterns (which are development models that you'll use repeatedly). With a mastery of these techniques, you'll be able to breathe new life into your Web sites.