%standard_section_headings =
        ('part' , 'H1' , 'chapter' , 'H1', 'section', 'H3', 'subsection', 'H3'
        , 'subsubsection', 'H3', 'paragraph', 'H4', 'subparagraph', 'H5'
        , %standard_section_headings );
%section_headings =
        ('tableofcontents', 'H3', 'listoffigures', 'H3', 'listoftables', 'H3'
        , 'bibliography', 'H3', 'textohtmlindex', 'H3'
        , %standard_section_headings
        , %section_headings);

sub top_navigation_panel {

    # Now add a few buttons with a space between them
    "$NEXT $UP $PREVIOUS $CONTENTS $INDEX $CUSTOM_BUTTONS" .
    
    "<BR>\n" .		# Line break
	
    # If ``next'' section exists, add its title to the navigation panel
    ($NEXT_TITLE ? "<B> Next:</B> $NEXT_TITLE\n" : undef) . 
    
    # Similarly with the ``up'' title ...
    ($UP_TITLE ? "<B>Up:</B> $UP_TITLE\n" : undef) . 
 
    # ... and the ``previous'' title
    ($PREVIOUS_TITLE ? "<B> Previous:</B> $PREVIOUS_TITLE\n" : undef) .
   
    #  Line Break, horizontal rule (3-d dividing line) and new paragraph  
    "<BR> <P>\n"		
}

sub bot_navigation_panel {

    #  Start with a horizontal rule (3-d dividing line)
    "<HR>".			
    
    # Now add a few buttons with a space between them
    "$NEXT $UP $PREVIOUS $CONTENTS $INDEX $CUSTOM_BUTTONS" .
    
    "<BR>\n" .		# Line break
	
    # If ``next'' section exists, add its title to the navigation panel
    ($NEXT_TITLE ? "<B> Next:</B> $NEXT_TITLE\n" : undef) . 
    
    # Similarly with the ``up'' title ...
    ($UP_TITLE ? "<B>Up:</B> $UP_TITLE\n" : undef) . 
 
    # ... and the ``previous'' title
    ($PREVIOUS_TITLE ? "<B> Previous:</B> $PREVIOUS_TITLE\n" : undef) 
   
}

1;	# This must be the last line
