#! /usr/bin/perl -w use strict; package main ; my $tester = new Tester ; $tester->run ; package Tester ; use base qw(CGI::Application); use CGI::Ajax; sub setup { my $self = shift; $self->run_modes([qw( start )]); } # define an anonymous perl subroutine that you want available to # javascript on the generated web page. # define a function to generate the web page - this can be done # million different ways, and can also be defined as an anonymous sub. # The only requirement is that the sub send back the html of the page. sub Show_HTML { my $html = ""; $html .= < CGI::Ajax Example
Enter a number: 
EOT return $html; } sub start { my $self = shift; my $evenodd_func = sub { my $input = shift; my $magic = "      look ma, no submit!
"; # see if input is defined if ( not defined $input ) { return("input not defined or NaN" . $magic); } # see if value is a number (*thanks Randall!*) if ( $input !~ /\A\d+\z/ ) { return("input is NaN" . $magic); } # got a number, so mod by 2 $input % 2 == 0 ? return("$input is EVEN" . $magic) : return("$input is ODD" . $magic); }; # don't forget the trailing ';', since this is an anon subroutine my $pjx = new CGI::Ajax( 'evenodd' => $evenodd_func ); $pjx->JSDEBUG(2); my $text = $pjx->build_html($self,\&Show_HTML); # this outputs the html for the page return $text ; }