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JavaScript is an interpreted programming or script language from Netscape. It is somewhat similar in capability to Microsoft's Visual Basic. 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:

  • Dynamically enhance images
  • 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

I modified the time and date JavaScripts on the upper right corner of this web page, as well as the dynamic greeting at the top of this page. I also used JavaScript to create the navigation bar on the left side of this page.