Typically JavaScript is invoked from HTML and HTML text and JavaScript text are intertwined
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If you need to make a dynamic page from C++ Perl or Java you must write the HTML from these languages
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You can invoke applets from HTML but HTML and applet actions are not linked. In case of JavaScript HTML and JavaScript are closely linked
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JavaScript is an example of an important concept -- the domain specific interpreter which we can expect to be of growing importance
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Note Postscript is an interpreter for text layout; MATLAB an interpreter for Matrix arithmetic, Mathematica or Maple for Mathematics .....
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Text ...................................................... Computer Language HTML---> JavaScript Java <----- C++
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