JavaScript - the powerful, object-based scripting language that can be embedded directly into HTML pages - has earned its place in the Web developer's toolkit, to the extent that it's now considered required knowledge for Web developers. You can use JavaScript to create dynamic, interactive applications that run completely within a Web browser. JavaScript is also the language of choice for developing Dynamic HTML content. Because its syntax is based on the popular programming languages C, C++, and Java, JavaScript is familiar and easy to learn for experienced programmers. At the same time, it's an interpreted scripting language, providing a flexible, forgiving programming environment for new programmers. This text provides a complete overview of the core Java language and client-side scripting environment, as well as quick-reference material on core and client-side objects, methods, and properties. The new edition has been revised to cover JavaScript 1.5, and is particularly useful for developers working with the latest standards-compliant web browsers, such as Internet Explorer 6, Netscape 7, and Mozilla. Ideal as an introduction for beginners and a quick reference for advanced developers, this pocket-sized book is easy to take anywhere and serves as a companion volume to "JavaScript: The Definitive Guide", 4th Edition. O'Reilly's Pocket References offer a wealth of important details in a concise, well-organized format, these handy books aim to deliver just what you need to complete the task at hand.