"JavaScript: The Definitive Guide provides a thorough description of the core JavaScript language and its client-side framework, complete with sophisticated examples that show you how to handle common tasks like validating form data, working with cookies, and creating cross-browser dynamic content. The book also contains an in-depth reference section that covers every core and client-side JavaScript function, object, method, property, constructor, and event handler. HTML authors can use this book to learn how to build dynamic web pages with JavaScript. Experienced programmers can quickly find the information they need to start writing JavaScript programs. This book is an indispensable reference for all JavaScript programmers, regardless of experience level. "--Jacket.