Not sure about multiple servers but to open a new page you can do it with some javascript. I have added the javascript to a new clickme button as an example.

#!/usr/bin/perl
# n.cgi

use strict;
use CGI qw( :standard );
use CGI::Carp qw( fatalsToBrowser );
use POSIX qw(strftime);

my $today = time;
my $yesterday = $today - 60 * 168 * 60;
my $FM = strftime "%m-%d-%Y", ( localtime($yesterday) );
my $TM = strftime '%m-%d-%Y', localtime;

# page layout
my $page =<< "EndOfText";
<h2>Add Logical:</h2>
<form name="form" method="post" action="n.cgi">
<table>
<tr>
  <td align="right"><strong>Logical:</strong></td>
  <td>
   <textarea id="ta" name="server" rows="1" cols="30" wrap="soft"></te
+xtarea>
  </td>
</tr>
<tr>
  <td colspan="2"> &nbsp; </td>
</tr>
<tr>
  <td> <button type="button" onClick="javascript:clickme()">Click Me</
+button></td>
  <td>
    <input type="submit" name="action" value="Search" />
  </td>
</tr>
</table>
</form>
EndOfText

# construct URL
my $URL = 'http://a.com:8080/bms/healthMonitor.do?method=redirect'
.'&operation=BackupHistorySearch'
.'&subOperation=GetReport'
."&fromDateStr=$FM&toDateStr=$TM";

# javascript
my $JSCRIPT=<<EOF;
  function clickme(){
    var URL = \'$URL\'
    + '&clientName=' + document.getElementById("ta").value
    // comment out if or remove when working OK
    if (confirm(URL)==true) { 
      window.open(URL)
    };
  }
EOF

# get parameters
my $q = CGI->new; 
my $action = $q->param('action');
my $server = $q->param('server');

# add server
$URL .= "&clientName=$server";

# redirect if required
if ($action eq 'Search'){ # remove hash to redirect
  print $q->redirect($URL);
} else {

  print $q->header, 
  $q->start_html( -title => "Some Title",
                  -script=> $JSCRIPT),
  $page, 
  $q->end_html; 

}
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poj