Lenguaje desarrollado por Netscape. Aunque es parecido a Java se diferencia de él en que los programas están incorporados en el fichero HTML.

(Formerly LiveScript) Netscape's simple, cross-platform, World-Wide Web scripting language, only very vaguely related to Java. JavaScript is intimately tied to the World-Wide Web, and currently runs in only three environments - as a server-side scripting language, as an embedded language in server-parsed HTML, and as an embedded language run in browsers.