JavaScript

JavaScript is a programming language used to make web pages interactive. It runs on your visitor’s computer and doesn’t require constant downloads from your website. JavaScript is often used to create polls and quizzes.

It is a scripting language developed by Netscape to enable Web authors to design interactive sites. Although it shares many of the features and structures of the full Java language, it was developed independently. Javascript can interact with HTML source code, enabling Web authors to spice up their sites with dynamic content. JavaScript is endorsed by a number of software companies and is an open language that anyone can use without purchasing a license.

JavaScript is an interpreted language, so no special program is required to create usable code. Any plain text editor such as Notepad is quite satisfactory for being able to write JavaScript.

Javascript can be integrated to the HTML file, but your scripts will be more easily reused on multiple pages of your site if you place them in separate files. (Using a .JS extension helps identify them as Javascript.) You then just link the JavaScript to your HTML by inserting a <script> tag. The same JavaScript can then be added to several pages just by adding the appropriate tag into each of the pages to set up the link.