sub pretty_table {
    my ($ary, $width, $no_center) = @_;
    my $header = $ary->[0];
    $width = $width ? qq!width="$width"! : '';
    my $html = qq!<table border="0" cellpadding="2" cellspacing="1" $width>\n!;
    my $cols = scalar @$header;
    $html .= get_row( $header, $cols, 'header' );
    my $flip_flop = 1;
    for my $row_ref ( @$ary[1..$#{$ary}] ) {
        my $class = $flip_flop ? 'light' : 'dark';
        $html .= get_row( $row_ref, $cols, $class );
        $flip_flop ^= 1;
    }
    $html .= qq!<tr><td colspan="$cols" class="header">&nbsp;</td></tr>\n!;
    $html .= "</table>\n";
    $html = qq!<div align="center"><center>\n$html</center></div>\n! unless $no_center;
  return $html
}

sub get_row {
    my ( $row_ref, $cols, $class ) = @_;
    my $html = qq!<tr>!;
    for my $td ( 0.. $cols-1 ) {
        my $data = defined $row_ref->[$td] ?  $row_ref->[$td] : '&nbsp;';
        $html .= qq!<td class="$class">$data</td>!;
    }
    $html .= "</tr>\n";
  return $html
}