Felow monks,

I have a cgi.pm based web app., where I want to show / hide a text field dynamically, based on the content of another text field in the app.

Digging into the cgi.pm doc., I can find no property on the field to accomplish this.

Any help / pointers appreciated.
Best regards, - Allan Dystrup.

UPDATE

my $JSCRIPT=<<ENDJS;
         function show_hide_fields()
         {
            var RunCmd = document.getElementById('popRunCmd').value;

            var rx_ver = new RegExp("^Build");
            var test_ver = ( rx_ver.test(RunCmd) ) ? "" : "none";
            document.getElementById('div_ver').style.display = test_ve
+r;

            var rx_rc  = new RegExp("Build [SB]DP release Produktion")
+;
            var test_rc = ( rx_rc.test(RunCmd) ) ? "" : "none";
            document.getElementById('div_rc').style.display = test_rc;
          }
ENDJS


      print $query->start_html(
         -title   => 'eDP Run Commands',
         -author  => 'and@kmd.dk',
         -script  => $JSCRIPT,
         -base    => 'false',
         -meta    => {
            'keywords'  => 'eDagpenge build server commands',
            'copyright' => 'copyright KMD' },
         -bgcolor => '#F1F1F1',
         -text    => '#4F4F4F',
      );

      print "<table>"
         .  "<tr>"

         .     "<td>"
         .     $query->popup_menu(
                  -name    => 'popRunCmd',
                  -values  => [
                    # cut out -- a lot of options goes here ...
                   ],
                  -default    => ' ',
                  -override   => 1,
                  -onChange   => 'show_hide_fields()',
               )
         .     "</td>"

         .     "<td>"
         .     "<div id='div_ver' style='display:none'>"
         .        textfield(
                     -name       => 'version',
                     -value      => '',
                     -override   => 1,
                     -size       => 8,
                  )
         .     "</div>"
         .     "</td>"
         
         .     "<td>"
         .     "<div id='div_rc' style='display:none'>"
         .        textfield(
                     -name       => 'relcand',
                     -value      => '',
                     -override   => 1,
                     -size       => 4,
                  )
         .     "</div>"
         .     "</td>"
         .  "</tr>"
         . "<table>";
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