Java Script is a user interface scripting language developed by Netscape for its Navigator and Communicator World-Wide Web browsers. Microsoft has developed a compatible language, called J-Script, for its Internet Explorer browser.

While the syntax of the Java Script programming language resembles that of Java, the two languages are actually unrelated. Java Script source code is embedded in HTML documents, and is interpreted by a World-Wide Web browser. Java source code is compiled into a bytecode, stored in a separate file, which the World-Wide Web browser downloads and executes separately from an HTML page.

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