Book excerpt: Ready to learn JavaScript? Start Here! Learn the fundamentals of modern programming with JavaScript—and begin building your first apps for the web. If you have no previous experience with JavaScript, no problem—simply start here! This book introduces must-know concepts and techniques through easy-to-follow explanations, examples, and exercises. Here’s where you start learning JavaScript Learn the basics of JavaScript programming Find out how to access browser content from JavaScript Manage images and validate form entries Retrieve data using the JavaScript Object Notation (JSON) Use JavaScript and HTML5 in Windows 8 applications Put it all together by creating your first programs