Javascript is a powerful, object-based scripting language, JavaScript programs can be embedded directly in HTML web pages. When combined with the Document Object Model (DOM) defined by a web browser, Javascript allows you to create Dynamic HTML (DHTML) content and interactive client-side web applications. JavaScript syntax is similar to that of other popular programming languages such as C, C++ and Java, which makes it easy to learn for experienced programmers. At the same time, JavaScript is an interpreted scripting language, providing a flexible, forgiving environment in which new programmers can learn. There's no need to buy a JavaScript compiler or interpreter---the JavaScript interpreter is shipped as part of your Internet Browser.