JavaScript (sometimes abbreviated JS) is a programming language that is widely used to give sophisticated functionality to web pages. It is also used occasionally in non-web-related applications—for example in PDF documents, site-specific browsers, and desktop widgets. JavaScript copies many names and naming conventions from the programming language Java, but the two languages are otherwise unrelated and have very different semantics. ... (source: http://en.wikipedia.org/wiki/JavaScript )    (3I0D)