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 and working with cookies. The book also contains a definitive, in-depth reference section that covers every core and client-side JavaScript function, object, method, property, constructor, and event handler. This book is an indispensable reference for all JavaScript programmers, regardless of experience level. This third edition of JavaScript: The Definitive Guide describes the latest version of the language, JavaScript 1.2, as supported by Netscape Navigator 4 and Internet Explorer 4. The book also covers JavaScript 1.1, which is the first industry-standard version known as ECMAScript.