The onsubmit option is the way to go:

-- test.tmpl -- 
<html>
<head>
<title>Test Page</title>
<script language="javascript">
<!--
function move_opt(source, destination) {
    for(var i = source.length - 1; i >= 0; i--) {
        if (source.options[i].selected) {
            destination.options[destination.length] = new Option(sourc
+e.options[i].text, source.options[i].value);
            source.options[i] = null;
        }
    }
}
// -->
</script>
<body>
<form action="test.cgi" method="get" onsubmit="for(var i = 0; i < docu
+ment.forms[0].box2.length; i++){document.forms[0].box2.options[i].sel
+ected = 'selected'}">
    <table>
    <tr>
        <td>
        <select name="box1" size="5" multiple="multiple">
        <!-- TMPL_LOOP NAME="list" -->
            <option value="<!-- TMPL_VAR NAME="value" -->"><!-- TMPL_V
+AR NAME="text" --></option>
        <!-- /TMPL_LOOP -->
        </select>
        </td>
        <td>
        <input type="button" value="->" onclick="move_opt(document.for
+ms[0].box1, document.forms[0].box2);"><br /><br />
        <input type="button" value="<-" onclick="move_opt(document.for
+ms[0].box2, document.forms[0].box1);">
        </td>
        <td>
        <select name="box2" size="5" multiple="multiple">
        </select>
        </td>
    </tr>
    <tr>
        <td colspan="3" align="center"><input type="submit" value="sub
+mit"></td>
    </tr>
    </table>
</form>
</body>
</html>

[download]
-- show_test.cgi -- 
#!/usr/bin/perl -w

use CGI;
use HTML::Template;
use strict;

my @ref = (
    {
        value => '1', text  => 'a',
        },
    {
        value => '2', text  => 'b',
        },
    {
        value => '3', text  => 'c',
        },
    {
        value => '4', text  => 'd',
        },
    {
        value => '5',text  => 'e',
        },
);  

my $q = new CGI;

print $q->header;
my $template = HTML::Template->new(filename => 'test.tmpl');
$template->param(list => \@ref);
print $template->output;

[download]
-- test.cgi -- 
#!/usr/bin/perl -w

use CGI;
use strict;

my $q = new CGI;

print $q->header;
print "$_<br>" foreach $q->param('box2');

[download]
I used method="GET" just to show the selected info in the URL.

--
Rock is dead. Long live paper and scissors!

In reply to Re: Multiple item selects and CGI.pm headaches! by LTjake
in thread Multiple item selects and CGI.pm headaches! by waswas-fng

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.