jQuery - Installation
jQuery, a Javascript library, is very easily can be added to a webpage; it is enough to download it and add a reference to a web page. jQuery is a single javascript file. Official site where you can download the last version is http://jquery.com.
1) Download the latest version from the official site
2) Copy the file to a location where you will create a site
3) Add the following line to the head tag of your site page: