Introduction to JavaScript The JavaScript programming language is one of the most popular languages in use today. Intially developed by Brendan Eich for the Netscape Navigator Web browser, it has become the standard scripting language in Web application Development. It is used mostly for creating client-side coding due to the fact that the JavaScript interpreter is built-in to all modern Web broswers. However, with the addition of Node.js, the JavaScript language can now be used to develop desktop applicaitons, Mobile applications, and for manipulating components on the Web server side of the Web development process. According to Mozilla.com, JavaScript is used on 98% of all websites. Browser Document Object Model JavaScript Class Example