JavaScript is a scripting language that mostly used for client-side web development. It was the originating dialect of the ECMAScript standard. It is a dynamic, weakly typed, prototype-based language with first-class functions. JavaScript was influenced by many languages and was designed to look like Java, but be easier for non-programmers to work with.
JavaScript provides an interface to a wide range of browser capabilities, however, it also bring some security problem. Attackers can write scripts and run them via JavaScript and do what they wish on the user's system.
Apart from the web browsers, JavaScript also apply on the web related programs like Apple and Yahoo! Widgets to offer user a new experience.
