avaScript is a key tool for building modern websites, and with this beginner-friendly guide, you'll be able to learn the language in no time and with minimal effort. Learn the structure of the language, how to write its instructions correctly, how to use CSS, work with online graphics, and connect HTML5 programming interfaces. All topics can be reinforced with practical exercises. Lay the foundations. Learn what JavaScript is, how it works, and where it's used. Start with the basics. Master the basic elements of JavaScript with simple exercises. Put it all together. Learn to use variables, arrays, operators, conditionals and loops. Organize your programs. Learn how to create and use functions and objects. Start creating online applications. Learn to write scripts that run in the browser, as well as manipulate documents, handle events, and connect I/O. Explore advanced topics. Master regular expressions, callbacks, anonymous functions, and closures. Use additional tools. Extend your programs with jQuery and HTML5 APIs. Test your skills. Try the JavaScript exercises.