What Are Jump Tags and How Do They Work?
    What is a jump tag? Well, many people (including the author) didn't like
    the really long URLs that Mig uses because it made it clumsy to paste
    them into an email or a chat window. However, changing them now would be
    difficult to do and certainly not backward-compatible.

    Jump tags were invented to address this problem. Take this URL for
    example:

    http://tangledhelix.com/gallery/index.php?pageType=folder&currDir=./Our%
    20House/Before%20We%20Redecorated

    At 105 characters long, and having tons of URL-encoded %xx entities in
    it, it's an ugly URL to send someone. But the pain can be alleviated.
    The jump map defines shortcuts for long URLs.

    Add a line to config.php that adds to the jump map.

        $jumpMap['me'] = 'currdir=./Pictures_of_me';

    Now "me" is defined as a shortcut for a folder at the root of the album
    called "Pictures of me". The long URL above would look like this:

        $jumpMap['house'] = 'currDir=./Our%20House/Before%20We%20Redecorated';

    All that is needed is the value of "currDir" (which can be copied from
    the address bar in most web browsers). Now this URL will go to the same
    place:

        http://tangledhelix.com/gallery/?jump=house

    Much shorter and nicer. If an album has four or five levels deep (such
    as some of the albums I maintain), the URLs can be very long.

    There are two ways to do this, too. The first is shown above. Another
    way is a URL like this:

        http://tangledhelix.com/gallery/index.php/house

    Which avoids clumsy stuff like the ? in the URL. It's a matter of
    preference which one to use. Note that with the second method it can't
    be shortened like this:

        http://tangledhelix.com/gallery/house

    Because the web server will look for that directory, not find it, and
    return an error. So that index.php or index.php3 has to be in there.

    This works with Apache web servers. I don't know if it works with
    anything else. If you're running something other than Apache, let me
    know how you fare with this feature.

  Tips for Apache Users
    Also see the apache document which has some nifty "mod_rewrite" ideas to
    utilize shorter, simpler URLs.