If you visit jquery.com, look at the simple site description “write less, do more”. That is exactly what you can do with jquery.
jQuery is a fast and concise JavaScript Library that simplifies HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery is designed to change the way that you write JavaScript. jQuery is so easy to use that even a beginner can use it instantly after a little practice.
Who use jQuery? You can name Facebook, Google, Dell, Bank of America, Digg, WordPress, Mozilla, etc.
Before you can use jQuery:
- you have to download the library from jQuery.com: http://code.jquery.com/jquery-1.5.2.min.js or http://code.jquery.com/jquery-latest.js
- save the javascript file as jquery.js
- place the file in the same directory as your HTML/ PHP file that runs the script.