I have a form page that has select options where I submit to a Perl action page. It works but the output is like this: 
California:
Oakland Fresno San Diego

Oregon:
Portland Eugene Corvallis

Utah:
Salt Lake Provo

[download]
I need the output to be like this: 
California:
Oakland 
Fresno 
San Diego

Oregon:
Portland
Eugene 
Corvallis

Utah:
Salt Lake
Provo

[download]
Current attempt: 
foreach $field (qw(California_c Oregon_o Utah_u)) {

   my @values = grep { ! /^\s*$/ } param($field);
   next unless @values;  # Skip if nothing available

   # Establish a header line.
   my $header = "";
   $header = "California:" if $field =~ /California_c/;
   $header = "Oregon:" if $field =~ /Oregon_o/;
   $header = "Utah:" if $field =~ /Utah_u/;

  
   #local $, = "\n";

   $theData .= "$header\n@values\n\n";
}

......
<table align=\"center\">
<tr><td><pre><font face=\"Arial, Helvetica, sans-serif\" color=\"blue\
+"><strong>$theData</strong></font></pre></td><tr>
</table>

[download]
Please advise.

In reply to output from a form page with multiple selects 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.