Java   Java is a modern Programming Language, first seen in 1995, & is used to bring Web Pages to life. Java programs are referred to as applets. Java is an interpreted, object-orientated program language with a syntax & structure similar to C++, designed specifically for the Internet by Sun Microsystems. One huge plus for Java is that Java program can run on many different types of computer (e.g. IBM PC, Apple Macintosh). Java Applets are always small & can be downloaded from the Internet & executed as part of the Web page being displayed.
JavaScript   JavaScript is a Programming Language for developing Client Internet applications. The WEB Browser interprets JavaScript statements embedded in an HTML page. Live Wire is the Server based equivalent, which enables you to create applications similar to Common Gateway Interface (CGI) programs.