JavaScript Cookies are a great way to save a user's preferences in his / her browser.

We have already learned the various parts of the cookie like name, value, expires, path, domain and security.

When a browser opens a web page, the browser reads the cookies (provided it has already stored it) that has stored in your machine.

Learn how to manipulate cookies using JavaScript with this tutorial. Re-usable functions for easy cookie access are provided, for use in your own scripts.

The piece of code we will be writing, using the YUI library (my favorite), will allow users to increase/decrease their font size for a block of text, storing the font size in a cookie so that when they return to the page they don't have to modify the font size again.

If your script relies on JavaScript cookies to store and persist information, it's a good idea to...