Just a couple of suggestions:

Don't use &subroutine; unless you're sure that you want to do that. You very likely want subroutine(); instead.

As for cleaning the code a litte: you could do something like:

Warning: untested code ahead 

my %opts = (
  bandwidth => { 
    err => 'Your Chosen Bandwidth Option Does Not Appear
            To Be Valid. Contact Support For Assistance.',
    match => qr/^15|0$/,
  },
  support => {
    err => 'Your Chosen Support Option Does Not Appear
            To Be Valid. Contact Support For Assistance.',
    match => qr/^2|0$/,
  }
   # etc etc.

);

my $error = '';
while (my ($name,$check) = each(%opts)) {
    unless ($q->param($name) =~ $check->{match}) {
       $error .= "<p>$check->{err}</p>\n";
    }
}
if ($error) {
   print_error($error);
}

[download]
At least I think it looks a little better :-) 
-- 
Joost       downtime n. The period during which a system
            is error-free and immune from user input.

[download]

In reply to Re: Validating incoming CGI form data by Joost
in thread Validating incoming CGI form data by Anonymous Monk

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.