5.1 Introduction to Scripting

Java Script is the scripting language of the Web.  Java Script is used in millions of Web pages to add functionality, validate forms, detect browsers, and much more.

The language was invented by Brendan Eich at Netscape (with Navigator (2.0), and has appeared in all Netscape and Microsoft browsers since 1996.  Java Sripts official name is “ECMA Script”.  The standard is developed and maintained by the ECMA-262 is the official Jawa Script standard.  The standard is based on Java Script (Netscape) and Jscript (Microsoft).  Microsoft version of Java Script is called Jscript.

JavaScript is well suited to Internet development, because it is a scripting language(which is interpreted as the moment it is run ), rather than a complied language.  For a script language, however, there is no complier, so the code always stays is the source code form.  When it is time to run the code, a scripting engine must interpret the code while it is running.

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