With the help of good ol' google, its simple to add jQuery support to any of your webpages. All you have to do is add the following code in the head of your webpage:
Now you can use jQuery anywhere on that page, woohoo :)
NOTE: The version number (1.2.6) in the url – as of writing this, 1.2.6 is the most current version of jQuery, you can replace the version number in the google url if a new version has come out.