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#include defs.wh2
#define _PAGE-TITLE_ Predefined functions
#define _TITLE-HEADER-TEXT_ Predefined functions
#include head.wh

There are a number of functions which are predefined.
These functions are in no way special, and can be used as a pattern
for writing your own functions which you can include with the
<a href=#directives>localcode</a> directive.  The output of the
these functions is stylized.  This is on purpose.
<p>
Functions are invoked by saying:
## Keep the #call on a line with leading characters to avoid it
## being eaten.
<pre>	#call FUNCTION
</pre>
Functions get the text after the function name as a single string
parameter which it can use as appropriate.
<p>
The standard functions are:
#pragma nodefine
<ul>
    <li><i>Modified</i>
    	This is probably the simplist function.  This displays
    	the modification date of the source file into the generated
    	HTML file.
    <li><i>HotBar</i> PAGELIST.FILE HOTBAR.FILE
    	This function generates a <i>Hot Button bar</i> when invoked.
    	This function generates a <i>Previous</i> and <i>Next</i>
        button to thread your pages together for those throwbacks
	(like me) who want to be able to run through the entire
	document.
	The PAGELIST.FILE file contains all
	of the source files in the appropriate order, one per line.
	Items in this file can be commented out by putting
	a "#" as the first character.  It is a fairly simple task
	using the commands <b>find</b>, <b>sort</b>, and <b>diff</b>
	to ensure that all of the source files actually are in the
	PAGELIST.FILE file.
	(See the <a href="Makefile">Makefile</a> for an example.)
    	In addition, the HOTBAR.FILE file
    	contains lines which have a URL followed by a caption.
    	This data is used to contruct a series of buttons with links
    	to the appropriate pages.  However, there will be no link
    	which would lead directly back to the page being processed.
    	Note that the PAGELIST.FILE and HOTBAR.FILE are assumed to
    	be relative to the file which #calls the HotBar function.
    	This might be a little surprising if the #call is made
    	from a different directory than the source file is in.
</ul>
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