use CGI;
$query = new CGI;

foreach ($query->param()) {
 $fields{$_} = $query->param($_);
}

# now you can access the HTML form field 'name' like so:
print "Hello, " . $fields{'name'} . "!\n";
# or you can use the CGI.pm methodology (which would mean
# you'd have to port all of the instances of your HTML form
# variables:
print "Hello, " . $query->param('name') . "!\n";