Well, you can have you script print to a file instead of (or in addition to) the standard output. I.e.:

$doc = '';
open (MYOUT, ">/mypath/output.html") or die $!;
$doc .= "<p>Mydata....</p>";
$doc .= "<p>Myotherdata....</p>";
print $doc;                 # This goes to the web browser
print MYOUT $doc;           # This goes to a files
close (MYOUT);
[download]

Hope this helps!

Michele.