JavaScript
Introduction
HTML (HyperText Markup Language) and CSS (Cascading Style Sheets) are two of the main tools for designing and and displaying websites and web pages. If they are combined with a client-side processing language like JavaScript to add dynamic and interactive content, then websites can be built that are clear, memorable, useful, informative, accessible, organised and maintainable. This section deals with JavaScript.
What is JavaScipt?
JavaScript is an object oriented programming language, although it can also be used as an imperative language as well. It is most commonly used to write client-side scripts in web pages. These allow a visitor to a web page to interact with it and to allow dynamic data changes on the web page. Don't confuse JavaScript with Java, by the way! They are two different languages, and used for different things.
JavaScript tutorials
There are many excellent tutorials available on JavaScript and if you already have a website, you will be up and running in no time. Try these or search for 'JavaScript tutorials':
http://www.w3schools.com/js/js_intro.asp
http://www.echoecho.com/javascript0.htm
http://www.lissaexplains.com/javascript.shtml
https://www.youtube.com/results?search_query=JavaScript+tutorials