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Implemented by HTML::Template.

=item __FIRST_COL_x__ 

(1|0) Where x is an integer.  For __FIRST_COL_3__, 1 would be returned on
 __COUNT__ values: 1, 4, 7, 10, etc.

=item __LAST_COL_x__

(1|0) Similar to __FIRST_COL_x__ but given x is 3, __LAST_COL_3__ 
would return 1, on the following iterations: 3, 6, 9, 12, etc.

=item __INNER_COL_x__

If an iteration is not a __FIRST_COL_x__ or a __LAST_COL_x__ it is an __INNER_COL_x__.

=item __ODD__

(1|0) Returns 1 on odd __COUNT__ values.

=item __EVEN__

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<a href="javascript: <TMPL_VAR NAME=SOME_SCRIPT>">



=head1 LOOP NAMES

A variety of loops are possible, and all can be nested inside of each other for some 
interesting and sometimes useless effects. Note that when looping through a series of 
directories, the current directory context changes. So multiple nested DIRS loops would result
in a directory tree because DIRS loops through the current directory context, and inside 
iterations change that same context.

Valid loop names are:

=over 4

=item PATH_FORWARD

Iterate through the path from the top (or home) directory as
defined by PerlSetVar to the current Directory.  Useful for making
breadcrumb trails.