JavaScript
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JavaScript


DEFINITION - JavaScript is an interpreted programming or script language from Netscape. It is somewhat similar in capability to Microsoft'sVisual Basic, Sun's Tcl, the UNIX-derived Perl, and IBM's Rexx. In general, script languages are easier and faster to code in than the more structured and compiled languages such as C and C++. Script languages generally take longer to process than compiled languages, but are very useful for shorter programs.

JavaScript is used in Web site development to do such things as:

  • Automatically change a formatted date on a Web page
  • Cause a linked-to page to appear in a popup window
  • Cause text or a graphic image to change during a mouse rollover

JavaScript uses some of the same ideas found in Java, the compiled object-oriented programming derived from C++. JavaScript code can be imbedded in HTML pages and interpreted by the Web browser (or client). JavaScript can also be run at the server as in Microsoft's Active Server Pages before the page is sent to the requestor. Both Microsoft and Netscape browsers support JavaScript, but sometimes in slightly different ways.

CONTRIBUTORS: H. Regev
LAST UPDATED: 12 Mar 2003

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More resources from around the web:
- The JavaScript Source not only provides guidance but includes a "cut-and-paste" library of ready-made or easily adapted JavaScript code sequences.
- Another very useful source is WebCoder.com .
- Rajesh Vijayakumar offers A Beginner's Guide to JavaScript .
- Webreference.com offers an archive of JavaScript Tips of the Week .
- developer.com offers a long list of sites offering JavaScript how-to and help .
- If you're really stumped, try Experts Exchange and ask a question. (At whatis.com, we got help successfully on the one occasion that we asked a question.)
- Search400.com has hundreds of links related to JavaScript.





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