CGI Perl

#!/usr/local/bin/perl
use CGI;
$co = new CGI;    
print $co->header,
$co->start_html('Image Map Example'),
$co->h1('Image Map Example'),
$co->start_form,
$co->image_button
(
    -name => 'map',
    -src=>'map.gif'
),
$co->p,
$co->end_form,
$co->hr;
if ($co->param())
{
    $x = $co->param('map.x');
    $y = $co->param('map.y');
    print "You clicked the map at ($x, $y)";
}
print $co->end_html;