They are quite easy to use via Javascript. Cookies do not work on local web-pages. They must reside on a webserver. A cookie has a Name , Value and Expire Date . The Name and Value are strings and must be enclosed like 'MyCookie' and 'MyValue'.
Cookie expires n milliseconds in the future.
If you want to read from another directory or host, see Netscapes javascript reference . The script below can delete your cookie. Real Comedy Inc.