JavaScript

A scripting language originally developed by Netscape and used to create interactive elements for websites.

JavaScript is used extensively on the web because it is supported by both Microsoft Internet Explorer and Netscape Navigator, although there are differences in how it is supported on different browsers.  This makes it important to test JavaScript code for cross-browser compatibility.

The code for JavaScript can be placed within each page or in a external file and delivered when the code is requested.

_{(Not to be confused with: Java)}