Are you ready to take a step forward in web programming and move from HTML and CSS layout to creating full-fledged dynamic pages? Then it's time to get acquainted with the "hottest" programming language - JavaScript! With this book you will learn everything about the JavaScript language: from variables to loops. You'll understand why different browsers respond differently to code and how to write universal code that is supported by all browsers. You'll see why you'll never have to worry about page congestion or data transfer errors with JavaScript code. Don't be alarmed, even if you haven't written a single line of code before - thanks to the unique format of presenting the material, this book will easily guide you along the entire learning path: from writing a simple script to creating complex web projects that will work in all modern browsers. A special feature of this publication is the unique way of presenting the material, which sets the O'Reilly "Head First" series apart from the many boring books on programming.