eval "use Some::Module"; 
$@ && print_an_error_message_with_a_nice_link_to_cpan();

##</code><code>##

#!/usr/bin/perl -w

use strict;
use CGI ':standard';
use_('Some::Module');
use_('Some::OtherModule');

install_modules() if %_; # if use_ fails this happens

sub use_
{
eval "use $_[0]";
$@ && $_{$_[0]}++;
undef $@
}

sub install_modules
{ # link to dist(s) on cpan
if(keys %_ > 1){ $_ = 's' } else { $_ = '' }

my $p = header;
$p .= qq~Required perl module$_ not found: ~;

for(keys %_){
	$p .= qq~<a href='http://search.cpan.org/search?dist=$_'>$_</a>, ~;
	}
$p =~ s|, $||;
print $p;
exit
}