I am new for perl-cgi script. and my objective is to create user/pass interactive script to log and get information from multiple device at once. instead of add the user/pass credential on the script itself. since i am new if some one show me how to write the interactive part of the script. thanks much!!!

here is the current code

usr/local/bin/perl -wl use CGI ':standard'; use Net::Telnet::Cisco;

### set the error fields to nulls

$selerror = "";

### Input from the screen - make sure data was input

if (param() and param('Switches') ne "" and
(param('Mac') ne "" or param('Interface Description') ne "" or param('VLAN') ne "" )) {

### Put the input devices into an array.

   @devices = param('Switches');

### format the header data

   print header();
   print start_html(-title=>"ShowSwitches",-BGCOLOR=>'aqua');
   print "\n",h1("<CENTER>Show Switches</CENTER>");
   print "\n",hr(),"\n";

### Go thru the device array.

foreach(@devices) {
   $error_msg   = "";
   $TAC_login_error  = "";
   $open_error  = "";
   $retry_open_error  = "";
   $prompt_error  = "";
   $password_error  = "";

### Take input host and use to send to Telnet

   $host = $_;
   $session = Net::Telnet::Cisco->new(Errmode => 'return',
                                      Timeout => 30);

### Connect to the host

   $session->open(Host =>"$host", Timeout => 15);
   $open_error = $session->errmsg;

### Login with TACACS if host can be connected to

   if ($open_error eq "") {
       $session->login('USER', 'PASS');
       $TAC_login_error = $session->errmsg;

### Login with TACACS failed - try standard login

       if ($TAC_login_error ne "") {

### Connect to host

           $session->open(Host =>"$host", Timeout => 15);
           $retry_open_error = $session->errmsg;

### Wait for password prompt - multiple matches - devices may have different device prompts.

           if ($retry_open_error eq "") {
               $session->waitfor(Match => '/Password:.*$/',
                             Match => '/Enter password:.*$/',
                             Timeout => 20);
               $prompt_error = $session->errmsg;
               if ($prompt_error eq "") {

### Input password

                  $session->print('getmeout');
                  $password_error = $session->errmsg;
                  $session->waitfor('/.*>$/');
                  $password_error = $session->errmsg;
                  }
          }
       }
   }

### No errors, then issue "show commands".

   if ($open_error eq "" and ($TAC_login_error eq "" or $retry_open_error eq "")
      and $prompt_error eq "" and $password_error eq "") 
      {

### Show Mac

       if (param('Mac')) {
           $cmd = 'sh mac';
           @output  = $session->cmd("$cmd");
           $show_error = "";
           $show_error = $session->errmsg;
           print "\n",h2($host . ' - ' . $cmd);
           if ($show_error ne "") {
               $error_msg = 'Error for show mac - ' . $show_error; 
               print b($error_msg),(br);
               print hr(),"\n";
               $error_msg = '';

           }
           else {
               print pre(@output);
               print hr(),"\n";
           }
       }

### Show Interface Description

       if (param('Interface Description')) {
           $cmd = 'sh interface description';
           @output  = $session->cmd("$cmd");
           $show_error = "";
           $show_error = $session->errmsg;
           print "\n",h2($host . ' - ' . $cmd);
           if ($show_error ne "") {
               $error_msg = 'Error for show mac - ' . $show_error; 
               print b($error_msg),(br);
               print hr(),"\n";
               $error_msg = '';

           }
           else {
               print pre(@output);
               print hr(),"\n";
           }
       }

### Show VLAN

       if (param('VLAN')) {
           $cmd = 'sh vlan';
           @output  = $session->cmd("$cmd");
           $show_error = "";
           $show_error = $session->errmsg;
           print "\n",h2($host . ' - ' . $cmd);
           if ($show_error ne "") {
               $error_msg = 'Error for show vlan - ' . $show_error; 
               print b($error_msg),(br);
               print hr(),"\n";
               $error_msg = '';
           }
           else {
               print pre(@output);
               print hr(),"\n";
           }
       }
   }
   elsif ($TAC_login_error ne "" and $password_error ne "") {
       $error_msg = "Error - $host " . $TAC_login_error . ' - possible incorrect TACACS or standard password parameters on device.'; 

   }
   elsif ($open_error ne "") {
       $error_msg = "Error - $host " . $open_error . ' - cannot connect to host - is it down??'; 
   }
   elsif ($prompt_error ne "") {
       $error_msg = "Error - $host " . $prompt_error . ' - password prompt not recognized - invalid TACACS (or user) password.'; 
   }
   elsif ($password_error ne "") {
       $error_msg = "Error - $host " . $password_error . ' - possible incorrect user/password parameters on device.'; 
   }
   if ($error_msg ne "" ) {
      print b($error_msg),(br);
      print hr(),"\n";
   }
   print hr(),"\n";
   print end_html(),"\n";

} } else {

### No Show command was selected.

if (param('Submit') and param('Mac') eq "" and param('Interface Description') eq "" and param('VLAN') eq "" ) { $selerror = 'No Show Displays were selected. Try again please!!'; } elsif

### No switch was selected.

 (param('Submit') and param('Switches') eq "") {
 $selerror = 'No devices were selected. Try again please!!';

}

### This formats the initial Show Web page.

print header(-Pragma=>'no-cache'),

    start_html(-title=>"Show Displays",-BGCOLOR=>'aqua'),

    h1("<CENTER>Show Switches</CENTER>"),hr(),

    start_form(),

    b("Select Show Commands:"), 

    br(),

    br(),

    checkbox(-name=>'Mac'),

    checkbox(-name=>'Interface Description'),

    checkbox(-name=>'VLAN'),

    br(),br(),hr(),br(),

    b("Select One or More Devices:"), 

    br(),

    br(),

    scrolling_list    (-name   => 'Switches',

                       -default=> "NONE",

                       -values => ['cs6a',  'cs7a',  'cs7b', 

                                   'cs8b',  'cs9a',  'c9b',  'csa'

                                   ], 

                       -multiple => 'true',

                       -size => 7,

                         ),
            p(submit('Submit'),reset('Reset')),

    b($selerror),

    end_form(),hr(),

    end_html();

}

#