Try this:

perldoc CGI.pm
/HTTP COOKIES

match should be ~ line 2600... its a good starting place! If you want a good book just on cookies (not perl specific), I can recommend "Cookies" by Simon St. Laurence, ISBN: 0 07 05098 9, or this cookie FAQ at Cookie Central. The FAQ ranges from "What is a cookie" to "How to set and collect Cookies". For the basic nuts and bolts, Netscape has a page too.

#!/home/bbq/bin/perl
# Trust no1!

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• Are you posting in the right place? Check out Where do I post X? to know for sure.
• Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:

  <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>

• Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
• Want more info? How to link or How to display code and escape characters are good places to start.