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Diff for /loncom/auth/lonlogin.pm between versions 1.133 and 1.163

version 1.133, 2010/03/03 17:00:01 version 1.163, 2015/06/06 14:08:58
Line 1 Line 1
 # The LearningOnline Network  # The LearningOnline Network
 # Login Screen  # Login Screen
 #  #
 # $Id$  # $Id$
 #  #
 # Copyright Michigan State University Board of Trustees  # Copyright Michigan State University Board of Trustees
 #  #
 # This file is part of the LearningOnline Network with CAPA (LON-CAPA).  # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
 #  #
 # LON-CAPA is free software; you can redistribute it and/or modify  # LON-CAPA is free software; you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by  # it under the terms of the GNU General Public License as published by
 # the Free Software Foundation; either version 2 of the License, or  # the Free Software Foundation; either version 2 of the License, or
 # (at your option) any later version.  # (at your option) any later version.
 #  #
 # LON-CAPA is distributed in the hope that it will be useful,  # LON-CAPA is distributed in the hope that it will be useful,
 # but WITHOUT ANY WARRANTY; without even the implied warranty of  # but WITHOUT ANY WARRANTY; without even the implied warranty of
 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 # GNU General Public License for more details.  # GNU General Public License for more details.
 #  #
 # You should have received a copy of the GNU General Public License  # You should have received a copy of the GNU General Public License
 # along with LON-CAPA; if not, write to the Free Software  # along with LON-CAPA; if not, write to the Free Software
 # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA  # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 #  #
 # /home/httpd/html/adm/gpl.txt  # /home/httpd/html/adm/gpl.txt
 #  #
 # http://www.lon-capa.org/  # http://www.lon-capa.org/
 #  #
   
 package Apache::lonlogin;  package Apache::lonlogin;
   
 use strict;  use strict;
 use Apache::Constants qw(:common);  use Apache::Constants qw(:common);
 use Apache::File ();  use Apache::File ();
 use Apache::lonnet;  use Apache::lonnet;
 use Apache::loncommon();  use Apache::loncommon();
 use Apache::lonauth();  use Apache::lonauth();
 use Apache::lonlocal;  use Apache::lonlocal;
 use Apache::migrateuser();  use Apache::migrateuser();
 use lib '/home/httpd/lib/perl/';  use lib '/home/httpd/lib/perl/';
 use LONCAPA;  use LONCAPA;
     
 sub handler {  sub handler {
     my $r = shift;      my $r = shift;
   
     &Apache::loncommon::get_unprocessed_cgi      &Apache::loncommon::get_unprocessed_cgi
  (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},   (join('&',$ENV{'QUERY_STRING'},$env{'request.querystring'},
       $ENV{'REDIRECT_QUERY_STRING'}),        $ENV{'REDIRECT_QUERY_STRING'}),
  ['interface','username','domain','firsturl','localpath','localres',   ['interface','username','domain','firsturl','localpath','localres',
   'token','role','symb']);    'token','role','symb','iptoken']);
     if (!defined($env{'form.firsturl'})) {      if (!defined($env{'form.firsturl'})) {
         &Apache::lonacc::get_posted_cgi($r,['firsturl']);          &Apache::lonacc::get_posted_cgi($r,['firsturl']);
     }      }
   
 # -- check if they are a migrating user  # -- check if they are a migrating user
     if (defined($env{'form.token'})) {      if (defined($env{'form.token'})) {
  return &Apache::migrateuser::handler($r);   return &Apache::migrateuser::handler($r);
     }      }
   
     &Apache::loncommon::no_cache($r);      &Apache::loncommon::no_cache($r);
     &Apache::lonlocal::get_language_handle($r);      &Apache::lonlocal::get_language_handle($r);
     &Apache::loncommon::content_type($r,'text/html');      &Apache::loncommon::content_type($r,'text/html');
     $r->send_http_header;      $r->send_http_header;
     return OK if $r->header_only;      return OK if $r->header_only;
   
   
 # Are we re-routing?  # Are we re-routing?
     if (-e '/home/httpd/html/lon-status/reroute.txt') {      my $londocroot = $r->dir_config('lonDocRoot');
  &Apache::lonauth::reroute($r);      if (-e "$londocroot/lon-status/reroute.txt") {
  return OK;   &Apache::lonauth::reroute($r);
     }   return OK;
       }
   
 # -------------------------------- Prevent users from attempting to login twice      $env{'form.firsturl'} =~ s/(`)/'/g;
     my $handle = &Apache::lonnet::check_for_valid_session($r);  
     if ($handle=~/^publicuser\_/) {  # -------------------------------- Prevent users from attempting to login twice
 # For "public user" - remove it, we apparently really want to login      my $handle = &Apache::lonnet::check_for_valid_session($r);
  unlink($r->dir_config('lonIDsDir')."/$handle.id");      if ($handle ne '') {
     } elsif ($handle ne '') {          my $lonidsdir=$r->dir_config('lonIDsDir');
 # Indeed, a valid token is found          if ($handle=~/^publicuser\_/) {
  my $start_page =   # For "public user" - remove it, we apparently really want to login
     &Apache::loncommon::start_page('Already logged in');      unlink($r->dir_config('lonIDsDir')."/$handle.id");
  my $end_page =           } else {
     &Apache::loncommon::end_page();  # Indeed, a valid token is found
         my $dest = '/adm/roles';              &Apache::lonnet::transfer_profile_to_env($lonidsdir,$handle);
         if ($env{'form.firsturl'} ne '') {      my $start_page =
             $dest = $env{'form.firsturl'};           &Apache::loncommon::start_page('Already logged in');
         }      my $end_page =
                   &Apache::loncommon::end_page();
     my $dom = &Apache::lonnet::default_login_domain();              my $dest = '/adm/roles';
     my %helpconfig = &Apache::lonnet::get_dom('configuration',['helpsettings'],$dom);              if ($env{'form.firsturl'} ne '') {
                       $dest = $env{'form.firsturl'};
     my $loginhelp_page = $helpconfig{'helpsettings'}{'loginhelpurl'};              }
     if ($loginhelp_page eq '') {      $r->print(
  $loginhelp_page = '/adm/loginproblems.html';                    $start_page
     }                   .'<p class="LC_warning">'.&mt('You are already logged in!').'</p>'
  $r->print(                   .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',
                   $start_page                    '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'
                  .'<h1>'.&mt('You are already logged in!').'</h1>'                   .$end_page
                  .'<p>'.&mt('Please either [_1]continue the current session[_2] or [_3]log out[_4].',                   );
                   '<a href="'.$dest.'">','</a>','<a href="/adm/logout">','</a>').'</p>'              return OK;
                  .'<p><a href="'.$loginhelp_page.'">'.&mt('Login problems?').'</a></p>'          }
                  .$dom.' '.$end_page      }
                  );  
         return OK;  # ---------------------------------------------------- No valid token, continue
     }  
   # ---------------------------- Not possible to really login to domain "public"
 # ---------------------------------------------------- No valid token, continue      if ($env{'form.domain'} eq 'public') {
    $env{'form.domain'}='';
  # ---------------------------- Not possible to really login to domain "public"   $env{'form.username'}='';
     if ($env{'form.domain'} eq 'public') {      }
  $env{'form.domain'}='';  
  $env{'form.username'}='';  # ------ Is this page requested because /adm/migrateuser detected an IP change?
     }      my %sessiondata;
 # ----------------------------------------------------------- Process Interface      if ($env{'form.iptoken'}) {
     $env{'form.interface'}=~s/\W//g;          %sessiondata = &Apache::lonnet::tmpget($env{'form.iptoken'});
           unless ($sessiondata{'sessionserver'}) {
     my $httpbrowser=$ENV{"HTTP_USER_AGENT"};              my $delete = &Apache::lonnet::tmpdel($env{'form.iptoken'});
               delete($env{'form.iptoken'});
     my $iconpath=           }
  &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));      }
   # ----------------------------------------------------------- Process Interface
     my $lonhost = $r->dir_config('lonHostID');      $env{'form.interface'}=~s/\W//g;
     my $domain = &Apache::lonnet::default_login_domain();  
     if ($lonhost ne '') {      (undef,undef,undef,undef,undef,undef,my $clientmobile) =
         my $redirect = &check_loginvia($domain,$lonhost);          &Apache::loncommon::decode_user_agent();
         if ($redirect) {  
             $r->print($redirect);      my $iconpath=
             return OK;   &Apache::loncommon::lonhttpdurl($r->dir_config('lonIconsURL'));
         }   
     }      my $lonhost = $r->dir_config('lonHostID');
       my $domain = &Apache::lonnet::default_login_domain();
     if (($env{'form.domain'}) &&       my $defdom = $domain;
  (&Apache::lonnet::domain($env{'form.domain'},'description'))) {      if ($lonhost ne '') {
  $domain=$env{'form.domain'};          unless ($sessiondata{'sessionserver'}) {
     }              my $redirect = &check_loginvia($domain,$lonhost);
     my $role    = $r->dir_config('lonRole');              if ($redirect) {
     my $loadlim = $r->dir_config('lonLoadLim');                  $r->print($redirect);
     my $servadm = $r->dir_config('lonAdmEMail');                  return OK;
     my $tabdir  = $r->dir_config('lonTabDir');              }
     my $include = $r->dir_config('lonIncludes');          }
     my $expire  = $r->dir_config('lonExpire');      }
     my $version = $r->dir_config('lonVersion');  
     my $host_name = &Apache::lonnet::hostname($lonhost);      if (($sessiondata{'domain'}) &&
           (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
 # --------------------------------------------- Default values for login fields          $domain=$sessiondata{'domain'};
       } elsif (($env{'form.domain'}) &&
     my $authusername=($env{'form.username'}?$env{'form.username'}:'');   (&Apache::lonnet::domain($env{'form.domain'},'description'))) {
     my $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);   $domain=$env{'form.domain'};
       }
 # ---------------------------------------------------------- Determine own load  
     my $loadavg;      my $role    = $r->dir_config('lonRole');
     {      my $loadlim = $r->dir_config('lonLoadLim');
  my $loadfile=Apache::File->new('/proc/loadavg');      my $uloadlim= $r->dir_config('lonUserLoadLim');
  $loadavg=<$loadfile>;      my $servadm = $r->dir_config('lonAdmEMail');
     }      my $tabdir  = $r->dir_config('lonTabDir');
     $loadavg =~ s/\s.*//g;      my $include = $r->dir_config('lonIncludes');
     my $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);      my $expire  = $r->dir_config('lonExpire');
     my $userloadpercent=&Apache::lonnet::userload();      my $version = $r->dir_config('lonVersion');
       my $host_name = &Apache::lonnet::hostname($lonhost);
 # ------------------------------------------------------- Do the load balancing  
     my $otherserver= &Apache::lonnet::absolute_url($host_name);  # --------------------------------------------- Default values for login fields
     my $firsturl=     
     ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});      my ($authusername,$authdomain);
 # ---------------------------------------------------------- Are we overloaded?      if ($sessiondata{'username'}) {
     if ((($userloadpercent>100.0)||($loadpercent>100.0))) {          $authusername=$sessiondata{'username'};
         my $unloaded=Apache::lonnet::spareserver($loadpercent,$userloadpercent);      } else {
  if ($unloaded) { $otherserver=$unloaded; }          $env{'form.username'} = &Apache::loncommon::cleanup_html($env{'form.username'});
     }          $authusername=($env{'form.username'}?$env{'form.username'}:'');
       }
 # ----------------------------------------------------------- Get announcements      if ($sessiondata{'domain'}) {
     my $announcements=&Apache::lonnet::getannounce();          $authdomain=$sessiondata{'domain'};
 # -------------------------------------------------------- Set login parameters      } else {
           $env{'form.domain'} = &Apache::loncommon::cleanup_html($env{'form.domain'});
     my @hexstr=('0','1','2','3','4','5','6','7',          $authdomain=($env{'form.domain'}?$env{'form.domain'}:$domain);
                 '8','9','a','b','c','d','e','f');      }
     my $lkey='';  
     for (0..7) {  # ---------------------------------------------------------- Determine own load
         $lkey.=$hexstr[rand(15)];      my $loadavg;
     }      {
    my $loadfile=Apache::File->new('/proc/loadavg');
     my $ukey='';   $loadavg=<$loadfile>;
     for (0..7) {      }
         $ukey.=$hexstr[rand(15)];      $loadavg =~ s/\s.*//g;
     }  
       my ($loadpercent,$userloadpercent);
     my $lextkey=hex($lkey);      if ($loadlim) {
     if ($lextkey>2147483647) { $lextkey-=4294967296; }          $loadpercent=sprintf("%.1f",100*$loadavg/$loadlim);
       }
     my $uextkey=hex($ukey);      if ($uloadlim) {
     if ($uextkey>2147483647) { $uextkey-=4294967296; }          $userloadpercent=&Apache::lonnet::userload();
       }
 # -------------------------------------------------------- Store away log token  
     my $tokenextras;      my $firsturl=
     if ($env{'form.role'}) {      ($env{'request.firsturl'}?$env{'request.firsturl'}:$env{'form.firsturl'});
         $tokenextras = '&role='.&escape($env{'form.role'});  
     }  # ----------------------------------------------------------- Get announcements
     if ($env{'form.symb'}) {      my $announcements=&Apache::lonnet::getannounce();
         if (!$tokenextras) {  # -------------------------------------------------------- Set login parameters
             $tokenextras = '&';  
         }      my @hexstr=('0','1','2','3','4','5','6','7',
         $tokenextras .= '&symb='.&escape($env{'form.symb'});                  '8','9','a','b','c','d','e','f');
     }      my $lkey='';
     my $logtoken=Apache::lonnet::reply(      for (0..7) {
        'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,          $lkey.=$hexstr[rand(15)];
        $lonhost);      }
   
 # ------------------- If we cannot talk to ourselves, we are in serious trouble      my $ukey='';
       for (0..7) {
     if ($logtoken eq 'con_lost') {          $ukey.=$hexstr[rand(15)];
         my $spares='';      }
  my $last;  
         foreach my $hostid (sort      my $lextkey=hex($lkey);
     {      if ($lextkey>2147483647) { $lextkey-=4294967296; }
  &Apache::lonnet::hostname($a) cmp  
     &Apache::lonnet::hostname($b);      my $uextkey=hex($ukey);
     }      if ($uextkey>2147483647) { $uextkey-=4294967296; }
     keys(%Apache::lonnet::spareid)) {  
             next if ($hostid eq $lonhost);  # -------------------------------------------------------- Store away log token
     my $hostname = &Apache::lonnet::hostname($hostid);      my $tokenextras;
     next if ($last eq $hostname);      if ($env{'form.role'}) {
             $spares.='<br /><font size="+1"><a href="http://'.          $tokenextras = '&role='.&escape($env{'form.role'});
                 $hostname.      }
                 '/adm/login?domain='.$authdomain.'">'.      if ($env{'form.symb'}) {
                 $hostname.'</a>'.          if (!$tokenextras) {
                 ' '.&mt('(preferred)').'</font>'.$/;              $tokenextras = '&';
     $last=$hostname;          }
         }          $tokenextras .= '&symb='.&escape($env{'form.symb'});
 $spares.= '<br />';      }
 my %all_hostnames = &Apache::lonnet::all_hostnames();      if ($env{'form.iptoken'}) {
 foreach my $hostid (sort          if (!$tokenextras) {
     {              $tokenextras = '&&';
  &Apache::lonnet::hostname($a) cmp          }
     &Apache::lonnet::hostname($b);          $tokenextras .= '&iptoken='.&escape($env{'form.iptoken'});
     }      }
     keys(%all_hostnames)) {      my $logtoken=Apache::lonnet::reply(
     next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});         'tmpput:'.$ukey.$lkey.'&'.$firsturl.$tokenextras,
     my $hostname = &Apache::lonnet::hostname($hostid);         $lonhost);
     next if ($last eq $hostname);  
     $spares.='<br /><a href="http://'.  # -- If we cannot talk to ourselves, or hostID does not map to a hostname
  $hostname.  #    we are in serious trouble
  '/adm/login?domain='.$authdomain.'">'.  
  $hostname.'</a>';      if (($logtoken eq 'con_lost') || ($logtoken eq 'no_such_host')) {
     $last=$hostname;          if ($logtoken eq 'no_such_host') {
 }              &Apache::lonnet::logthis('No valid logtoken for log-in page -- unable to determine hostname for hostID: '.$lonhost.'. Check entry in hosts.tab');
 $r->print(          }
    '<html>'          my $spares='';
   .'<head><title>'   my $last;
   .&mt('The LearningOnline Network with CAPA')          foreach my $hostid (sort
   .'</title></head>'      {
   .'<body bgcolor="#FFFFFF">'   &Apache::lonnet::hostname($a) cmp
   .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'      &Apache::lonnet::hostname($b);
   .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'      }
   .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>'      keys(%Apache::lonnet::spareid)) {
   .'<p>'.&mt('Please attempt to login to one of the following servers:').'</p>'              next if ($hostid eq $lonhost);
   .$spares      my $hostname = &Apache::lonnet::hostname($hostid);
   .'</body>'      next if (($last eq $hostname) || ($hostname eq ''));
   .'</html>'              $spares.='<br /><font size="+1"><a href="http://'.
 );                  $hostname.
 return OK;                  '/adm/login?domain='.$authdomain.'">'.
 }                  $hostname.'</a>'.
                   ' '.&mt('(preferred)').'</font>'.$/;
 # ----------------------------------------------- Apparently we are in business      $last=$hostname;
 $servadm=~s/\,/\<br \/\>/g;          }
           if ($spares) {
 # ----------------------------------------------------------- Front page design              $spares.= '<br />';
 my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);          }
 my $font=&Apache::loncommon::designparm('login.font',$domain);          my %all_hostnames = &Apache::lonnet::all_hostnames();
 my $link=&Apache::loncommon::designparm('login.link',$domain);          foreach my $hostid (sort
 my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);      {
 my $alink=&Apache::loncommon::designparm('login.alink',$domain);   &Apache::lonnet::hostname($a) cmp
 my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);      &Apache::lonnet::hostname($b);
 my $logo=&Apache::loncommon::designparm('login.logo',$domain);      }
 my $img=&Apache::loncommon::designparm('login.img',$domain);      keys(%all_hostnames)) {
 my $domainlogo='<div>'.&Apache::loncommon::domainlogo($domain).'</div>';              next if ($hostid eq $lonhost || $Apache::lonnet::spareid{$hostid});
 my $login=&Apache::loncommon::designparm('login.login',$domain);              my $hostname = &Apache::lonnet::hostname($hostid);
 if ($login eq '') {              next if (($last eq $hostname) || ($hostname eq ''));
 $login = $iconpath.'/'.&mt('userauthentication.gif');              $spares.='<br /><a href="http://'.
 }               $hostname.
 my $showbanner = 1;               '/adm/login?domain='.$authdomain.'">'.
 my $showmainlogo = 1;               $hostname.'</a>';
 if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {              $last=$hostname;
     $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);           }
 }           $r->print(
 if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {     '<html>'
     $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);    .'<head><title>'
 }    .&mt('The LearningOnline Network with CAPA')
 my $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);    .'</title></head>'
 my $showcoursecat =    .'<body bgcolor="#FFFFFF">'
 &Apache::loncommon::designparm('login.coursecatalog',$domain);    .'<h1>'.&mt('The LearningOnline Network with CAPA').'</h1>'
 my $loginheader =&Apache::loncommon::designparm('login.loginheader',$domain);    .'<img src="/adm/lonKaputt/lonlogo_broken.gif" align="right" />'
 my $shownewuserlink =     .'<h3>'.&mt('This LON-CAPA server is temporarily not available for login.').'</h3>');
 &Apache::loncommon::designparm('login.newuser',$domain);          if ($spares) {
 my $now=time;              $r->print('<p>'.&mt('Please attempt to login to one of the following servers:')
 my $js = (<<ENDSCRIPT);                       .'</p>'
                        .$spares);
 <script type="text/javascript" language="JavaScript">          }
 // <![CDATA[          $r->print('</body>'
 function send()                   .'</html>'
 {          );
 this.document.server.elements.uname.value          return OK;
 =this.document.client.elements.uname.value;      }
   
 this.document.server.elements.udom.value  # ----------------------------------------------- Apparently we are in business
 =this.document.client.elements.udom.value;      $servadm=~s/\,/\<br \/\>/g;
   
 uextkey=this.document.client.elements.uextkey.value;  # ----------------------------------------------------------- Front page design
 lextkey=this.document.client.elements.lextkey.value;      my $pgbg=&Apache::loncommon::designparm('login.pgbg',$domain);
 initkeys();      my $font=&Apache::loncommon::designparm('login.font',$domain);
       my $link=&Apache::loncommon::designparm('login.link',$domain);
 this.document.server.elements.upass0.value      my $vlink=&Apache::loncommon::designparm('login.vlink',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(0,15));      my $alink=&Apache::loncommon::designparm('login.alink',$domain);
 this.document.server.elements.upass1.value      my $mainbg=&Apache::loncommon::designparm('login.mainbg',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(15,15));      my $loginbox_bg=&Apache::loncommon::designparm('login.sidebg',$domain);
 this.document.server.elements.upass2.value      my $loginbox_header_bgcol=&Apache::loncommon::designparm('login.bgcol',$domain);
     =crypted(this.document.client.elements.upass$now.value.substr(30,15));      my $loginbox_header_textcol=&Apache::loncommon::designparm('login.textcol',$domain);
       my $logo=&Apache::loncommon::designparm('login.logo',$domain);
 this.document.client.elements.uname.value='';      my $img=&Apache::loncommon::designparm('login.img',$domain);
 this.document.client.elements.upass$now.value='';      my $domainlogo=&Apache::loncommon::domainlogo($domain);
       my $showbanner = 1;
 this.document.server.submit();      my $showmainlogo = 1;
 return false;      if (defined(&Apache::loncommon::designparm('login.showlogo_img',$domain))) {
 }          $showbanner = &Apache::loncommon::designparm('login.showlogo_img',$domain);
 // ]]>      }
 </script>      if (defined(&Apache::loncommon::designparm('login.showlogo_logo',$domain))) {
           $showmainlogo = &Apache::loncommon::designparm('login.showlogo_logo',$domain);
 ENDSCRIPT      }
       my $showadminmail;
 # --------------------------------------------------- Print login screen header      my @possdoms = &Apache::lonnet::current_machine_domains();
       if (grep(/^\Q$domain\E$/,@possdoms)) {
 my %add_entries = (          $showadminmail=&Apache::loncommon::designparm('login.adminmail',$domain);
        bgcolor      => "$mainbg",      }
        text         => "$font",      my $showcoursecat =
        link         => "$link",          &Apache::loncommon::designparm('login.coursecatalog',$domain);
        vlink        => "$vlink",      my $shownewuserlink =
        alink        => "$alink",);          &Apache::loncommon::designparm('login.newuser',$domain);
       my $showhelpdesk =
 $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,          &Apache::loncommon::designparm('login.helpdesk',$domain);
        { 'redirect'       => [$expire,'/adm/roles'],       my $now=time;
  'add_entries' => \%add_entries,      my $js = (<<ENDSCRIPT);
  'only_body'   => 1,}));  
   <script type="text/javascript" language="JavaScript">
 # ----------------------------------------------------------------------- Texts  // <![CDATA[
   function send()
 my %lt=&Apache::lonlocal::texthash(  {
           'un'       => 'Username',  this.document.server.elements.uname.value
           'pw'       => 'Password',  =this.document.client.elements.uname.value;
           'dom'      => 'Domain',  
           'perc'     => 'percent',  this.document.server.elements.udom.value
           'load'     => 'Server Load',  =this.document.client.elements.udom.value;
           'userload' => 'User Load',  
           'catalog'  => 'Course/Community Catalog',  uextkey=this.document.client.elements.uextkey.value;
           'log'      => 'Log in',  lextkey=this.document.client.elements.lextkey.value;
           'help'     => 'Log-in Help',  initkeys();
           'serv'     => 'Server',  
           'servadm'  => 'Server Administration',  this.document.server.elements.upass0.value
           'helpdesk' => 'Contact Helpdesk',      =this.document.client.elements.upass$now.value.substr(0,15);
           'forgotpw' => 'Forgot password?',  this.document.server.elements.upass1.value
           'newuser'  => 'New User?',      =this.document.client.elements.upass$now.value.substr(15,15);
        );  this.document.server.elements.upass2.value
 # -------------------------------------------------- Change password field name      =this.document.client.elements.upass$now.value.substr(30,15);
   
 my $forgotpw = &forgotpwdisplay(%lt);  if(this.document.server.action.substr(0,5) === 'http:'){
 $forgotpw .= '<br />' if $forgotpw;      for (var idx in [1,2,3]){
 my $loginhelp = &loginhelpdisplay(%lt);          this.document.server.elements['upass' + idx].value =
 $loginhelp .= '<br />' if $loginhelp;              crypted(this.document.server.elements['upass' + idx].value);
       }
 # ---------------------------------------------------- Serve out DES JavaScript  }
 {  
 my $jsh=Apache::File->new($include."/londes.js");  this.document.client.elements.uname.value='';
 $r->print(<$jsh>);  this.document.client.elements.upass$now.value='';
 }  
 # ---------------------------------------------------------- Serve rest of page  this.document.server.submit();
   return false;
 $r->print(  }
   '<div class="LC_loginpage_container">');  
   function enableInput() {
 #      this.document.client.elements.upass$now.removeAttribute("readOnly");
 #  If the loadbalancing yielded just http:// because perhaps there's no loadbalancing?      this.document.client.elements.uname.removeAttribute("readOnly");
 #  then just us a relative link to authenticate:      this.document.client.elements.udom.removeAttribute("readOnly");
 #      return;
   }
 $r->print(<<ENDSERVERFORM);  
 <form name="server" action="$otherserver/adm/authenticate" method="post" target="_top">  // ]]>
    <input type="hidden" name="logtoken" value="$logtoken" />  </script>
    <input type="hidden" name="serverid" value="$lonhost" />  
    <input type="hidden" name="uname" value="" />  ENDSCRIPT
    <input type="hidden" name="upass0" value="" />  
    <input type="hidden" name="upass1" value="" />  # --------------------------------------------------- Print login screen header
    <input type="hidden" name="upass2" value="" />  
    <input type="hidden" name="udom" value="" />      my %add_entries = (
    <input type="hidden" name="localpath" value="$env{'form.localpath'}" />         bgcolor      => "$mainbg",
    <input type="hidden" name="localres" value="$env{'form.localres'}" />         text         => "$font",
   </form>         link         => "$link",
 ENDSERVERFORM         vlink        => "$vlink",
 my $coursecatalog;         alink        => "$alink",
 if (($showcoursecat eq '') || ($showcoursecat)) {                 onload       => 'javascript:enableInput();',);
     $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';  
 }      my ($lonhost_in_use,$headextra);
 my $newuserlink;      my @hosts = &Apache::lonnet::current_machine_ids();
 if ($shownewuserlink) {      my $lonhost_in_use = $lonhost;
     $newuserlink = &newuser_link($lt{'newuser'}).'<br />';      if (@hosts > 1) {
 }          foreach my $hostid (@hosts) {
 my $logintitle;              if (&Apache::lonnet::host_domain($hostid) eq $defdom) {
 if ($loginheader eq 'text') {                  $lonhost_in_use = $hostid;
     $logintitle ='<h2>'.$lt{'log'}.'</h2>';                  last;
 } else {              }
     $logintitle = '<img src="'.$login.'" alt="'.          }
                   &mt('User Authentication').'" />';      }
 }      my %defaultdomconf = &Apache::loncommon::get_domainconf($defdom);
       my $headextra = $defaultdomconf{$defdom.'.login.headtag_'.$lonhost_in_use};
 my $noscript_warning='<noscript><span class="LC_warning"><b>'      my $headextra_exempt = $defaultdomconf{$domain.'.login.headtag_exempt_'.$lonhost_in_use};
                      .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')      if ($headextra) {
                     .'</b></span></noscript>';          my $omitextra;
 my $helpdeskscript;          if ($headextra_exempt ne '') {
 my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,              my @exempt = split(',',$headextra_exempt);
                                    $authdomain,\$helpdeskscript);              my $ip = $ENV{'REMOTE_ADDR'};
               if (grep(/^\Q$ip\E$/,@exempt)) {
 my $loginform=(<<LFORM);                  $omitextra = 1;
 <form name="client" action="" onsubmit="return(send())">              }
   <input type="hidden" name="lextkey" value="$lextkey" />          }
   <input type="hidden" name="uextkey" value="$uextkey" />          unless ($omitextra) {
   <b><label for="uname">$lt{'un'}</label>:</b><br />              my $confname = $defdom.'-domainconfig';
   <input type="text" name="uname" id="uname" size="15" value="$authusername" /><br />              if ($headextra =~ m{^\Q/res/$defdom/$confname/login/headtag/$lonhost_in_use/\E}) {
   <b><label for="upass$now">$lt{'pw'}</label>:</b><br />                  my $extra = &Apache::lonnet::getfile(&Apache::lonnet::filelocation("",$headextra));
   <input type="password" name="upass$now" id="upass$now" size="15" /><br />                  unless ($extra eq '-1') {
   <b><label for="udom">$lt{'dom'}</label>:</b><br />                      $js .= "\n".$extra."\n";
   <input type="text" name="udom" id="udom" size="15" value="$authdomain" /><br />                  }
   <input type="submit" value="$lt{'log'}" />              }
 </form>          }
 LFORM      }
   
     if ($showbanner) {      $r->print(&Apache::loncommon::start_page('The LearningOnline Network with CAPA Login',$js,
         $r->print(<<HEADER);         { 'redirect'       => [$expire,'/adm/roles'],
 <!-- The LON-CAPA Header -->   'add_entries' => \%add_entries,
 <div style="background:$pgbg;margin:0;width:100%;">   'only_body'   => 1,}));
   <img src="$img" border="0" alt="The Learning Online Network with CAPA" />  
 </div>  # ----------------------------------------------------------------------- Texts
 HEADER  
     }      my %lt=&Apache::lonlocal::texthash(
     $r->print(<<ENDTOP);            'un'       => 'Username',
 <div class="LC_loginpage_space">&nbsp;</div>            'pw'       => 'Password',
 <div class="LC_loginpage_floatLeft">            'dom'      => 'Domain',
 <div class="LC_loginpage_loginContainer">            'perc'     => 'percent',
   $logintitle            'load'     => 'Server Load',
    <table border="0" align="left" cellspacing="1" cellpadding="2" width="100%">            'userload' => 'User Load',
       <tr>            'catalog'  => 'Course/Community Catalog',
    <td>            'log'      => 'Log in',
  $loginform            'help'     => 'Log-in Help',
            </td>            'serv'     => 'Server',
       </tr>            'servadm'  => 'Server Administration',
    </table>              'helpdesk' => 'Contact Helpdesk',
    $noscript_warning            'forgotpw' => 'Forgot password?',
 </div>            'newuser'  => 'New User?',
            );
 <div class="LC_loginpage_loginInfo">  # -------------------------------------------------- Change password field name
   $loginhelp  
   $forgotpw      my $forgotpw = &forgotpwdisplay(%lt);
   $contactblock      $forgotpw .= '<br />' if $forgotpw;
   $newuserlink      my $loginhelp = &Apache::lonauth::loginhelpdisplay($authdomain);
   $coursecatalog      if ($loginhelp) {
 </div>          $loginhelp = '<a href="'.$loginhelp.'">'.$lt{'help'}.'</a><br />';
 </div>      }
 ENDTOP  
     if ($showmainlogo) {  # ---------------------------------------------------- Serve out DES JavaScript
         $r->print(' <img src="'.$logo.'" alt="" />'."\n");      {
     }      my $jsh=Apache::File->new($include."/londes.js");
 $r->print(<<ENDTOP);      $r->print(<$jsh>);
 $announcements      }
 $domainlogo  # ---------------------------------------------------------- Serve rest of page
 <div class="LC_loginpage_space">&nbsp;</div>  
 ENDTOP      $r->print(
       '<div class="LC_Box"'
 $r->print(<<ENDDOCUMENT);     .' style="margin:0 auto; padding:10px; width:90%; height: auto; background-color:#FFFFFF;">'
      <table border="0" cellspacing="0" cellpadding="0">  );
       <tr>  
        <td  align="left" valign="top">      $r->print(<<ENDSERVERFORM);
         <small><b>$lt{'dom'}:&nbsp;</b></small>  <form name="server" action="/adm/authenticate" method="post" target="_top">
        </td>     <input type="hidden" name="logtoken" value="$logtoken" />
        <td  align="left" valign="top">     <input type="hidden" name="serverid" value="$lonhost" />
         <small><tt>&nbsp;$domain</tt></small>     <input type="hidden" name="uname" value="" />
        </td>     <input type="hidden" name="upass0" value="" />
       </tr>     <input type="hidden" name="upass1" value="" />
       <tr>     <input type="hidden" name="upass2" value="" />
        <td  align="left" valign="top">     <input type="hidden" name="udom" value="" />
         <small><b>$lt{'serv'}:&nbsp;</b></small>     <input type="hidden" name="localpath" value="$env{'form.localpath'}" />
        </td>     <input type="hidden" name="localres" value="$env{'form.localres'}" />
        <td align="left" valign="top">    </form>
         <small><tt>&nbsp;$lonhost ($role)</tt></small>  ENDSERVERFORM
        </td>      my $coursecatalog;
       </tr>      if (($showcoursecat eq '') || ($showcoursecat)) {
       <tr>          $coursecatalog = &coursecatalog_link($lt{'catalog'}).'<br />';
        <td align="left" valign="top">      }
         <small><b>$lt{'load'}:&nbsp;</b></small>      my $newuserlink;
        </td>      if ($shownewuserlink) {
        <td align="left" valign="top">          $newuserlink = &newuser_link($lt{'newuser'}).'<br />';
         <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>      }
        </td>      my $logintitle =
       </tr>          '<h2 class="LC_hcell"'
       <tr>         .' style="background:'.$loginbox_header_bgcol.';'
        <td align="left" valign="top">         .' color:'.$loginbox_header_textcol.'">'
         <small><b>$lt{'userload'}:&nbsp;</b></small>         .$lt{'log'}
        </td>         .'</h2>';
        <td align="left" valign="top">  
         <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>      my $noscript_warning='<noscript><span class="LC_warning"><b>'
        </td>                          .&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.')
       </tr>                          .'</b></span></noscript>';
       <tr>      my $helpdeskscript;
        <td colspan="2" align="left">      my $contactblock = &contactdisplay(\%lt,$servadm,$showadminmail,
         <small>$version</small>                                         $authdomain,\$helpdeskscript,
        </td>                                         $showhelpdesk,\@possdoms);
       </tr>  
      </table>      my $mobileargs;
  </div>      if ($clientmobile) {
           $mobileargs = 'autocapitalize="off" autocorrect="off"';
 <script type="text/javascript">      }
 // <![CDATA[      my $loginform=(<<LFORM);
 // the if prevents the script error if the browser can not handle this  <form name="client" action="" onsubmit="return(send())">
 if ( document.client.uname ) { document.client.uname.focus(); }    <input type="hidden" name="lextkey" value="$lextkey" />
 // ]]>    <input type="hidden" name="uextkey" value="$uextkey" />
 </script>    <b><label for="uname">$lt{'un'}</label>:</b><br />
 $helpdeskscript    <input type="text" name="uname" id="uname" size="15" value="$authusername" readonly="readonly" $mobileargs /><br />
     <b><label for="upass$now">$lt{'pw'}</label>:</b><br />
 ENDDOCUMENT    <input type="password" name="upass$now" id="upass$now" size="15" readonly="readonly" /><br />
     my %endargs = ( 'noredirectlink' => 1, );    <b><label for="udom">$lt{'dom'}</label>:</b><br />
     $r->print(&Apache::loncommon::end_page(\%endargs));    <input type="text" name="udom" id="udom" size="15" value="$authdomain" readonly="readonly" $mobileargs /><br />
     return OK;    <input type="submit" value="$lt{'log'}" />
 }  </form>
   LFORM
 sub check_loginvia {  
     my ($domain,$lonhost) = @_;      if ($showbanner) {
     if ($domain eq '' || $lonhost eq '') {          $r->print(<<HEADER);
         return;  <!-- The LON-CAPA Header -->
     }  <div style="background:$pgbg;margin:0;width:100%;">
     my %domconfhash = &Apache::loncommon::get_domainconf($domain);    <img src="$img" border="0" alt="The Learning Online Network with CAPA" />
     my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};  </div>
     my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};  HEADER
     my $output;      }
     if ($loginvia ne '') {      $r->print(<<ENDTOP);
         my $noredirect;  <div style="float:left;margin-top:0;">
         my $ip = $ENV{'REMOTE_ADDR'};  <div class="LC_Box" style="background:$loginbox_bg;">
         if ($ip eq '127.0.0.1') {    $logintitle
             $noredirect = 1;    $loginform
         } else {    $noscript_warning
             if ($loginvia_exempt ne '') {  </div>
                 my @exempt = split(',',$loginvia_exempt);   
                 if (grep(/^\Q$ip\E$/,@exempt)) {  <div class="LC_Box" style="padding-top: 10px;">
                     $noredirect = 1;    $loginhelp
                 }    $forgotpw
             }    $contactblock
         }    $newuserlink
         unless ($noredirect) {    $coursecatalog
             my ($newhost,$path);  </div>
             if ($loginvia =~ /:/) {  </div>
                 ($newhost,$path) = split(':',$loginvia);  
             } else {  <div>
                 $newhost = $loginvia;  ENDTOP
             }      if ($showmainlogo) {
             if ($newhost ne $lonhost) {          $r->print(' <img src="'.$logo.'" alt="" />'."\n");
                 if (&Apache::lonnet::hostname($newhost) ne '') {      }
                     $output = &redirect_page($newhost,$path);  $r->print(<<ENDTOP);
                 }  $announcements
             }  </div>
         }  <hr style="clear:both;" />
     }  ENDTOP
     return $output;      my ($domainrow,$serverrow,$loadrow,$userloadrow,$versionrow);
 }      $domainrow = <<"END";
         <tr>
 sub redirect_page {         <td  align="left" valign="top">
     my ($desthost,$path) = @_;          <small><b>$lt{'dom'}:&nbsp;</b></small>
     my $protocol = $Apache::lonnet::protocol{$desthost};         </td>
     $protocol = 'http' if ($protocol ne 'https');         <td  align="left" valign="top">
     unless ($path =~ m{^/}) {          <small><tt>&nbsp;$domain</tt></small>
         $path = '/'.$path;         </td>
     }        </tr>
     my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;  END
     if ($env{'form.firsturl'} ne '') {      $serverrow = <<"END";
         $url .='?firsturl='.$env{'form.firsturl'};        <tr>
     }         <td  align="left" valign="top">
     my $start_page = &Apache::loncommon::start_page('Switching Server',undef,          <small><b>$lt{'serv'}:&nbsp;</b></small>
                                                     {'redirect' => [0,$url],});         </td>
     my $end_page   = &Apache::loncommon::end_page();         <td align="left" valign="top">
     return $start_page.$end_page;          <small><tt>&nbsp;$lonhost ($role)</tt></small>
 }         </td>
         </tr>
 sub contactdisplay {  END
     my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript) = @_;      if ($loadlim) {
     my $contactblock;          $loadrow = <<"END";
     my $showhelpdesk = 0;        <tr>
     my $requestmail = $Apache::lonnet::perlvar{'lonSupportEMail'};         <td align="left" valign="top">
     if ($requestmail =~ m/^[^\@]+\@[^\@]+$/) {          <small><b>$lt{'load'}:&nbsp;</b></small>
         $showhelpdesk = 1;         </td>
     }         <td align="left" valign="top">
     if ($servadm && $showadminmail) {          <small><tt>&nbsp;$loadpercent $lt{'perc'}</tt></small>
         $contactblock .= $$lt{'servadm'}.':<br />'.         </td>
                          '<tt>'.$servadm.'</tt><br />';        </tr>
     }  END
     if ($showhelpdesk) {      }
         $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';      if ($uloadlim) {
         my $thisurl = &escape('/adm/login');          $userloadrow = <<"END";
         $$helpdeskscript = <<"ENDSCRIPT";        <tr>
 <script type="text/javascript">         <td align="left" valign="top">
 // <![CDATA[          <small><b>$lt{'userload'}:&nbsp;</b></small>
 function helpdesk() {         </td>
     var codedom = document.client.udom.value;         <td align="left" valign="top">
     if (codedom == '') {          <small><tt>&nbsp;$userloadpercent $lt{'perc'}</tt></small>
         codedom = "$authdomain";         </td>
     }        </tr>
     var querystr = "origurl=$thisurl&codedom="+codedom;  END
     document.location.href = "/adm/helpdesk?"+querystr;      }
     return;      if (($version ne '') && ($version ne '<!-- VERSION -->')) {
 }          $versionrow = <<"END";
 // ]]>        <tr>
 </script>         <td colspan="2" align="left">
 ENDSCRIPT          <small>$version</small>
     }         </td>
     return $contactblock;        </tr>
 }  END
       }
 sub forgotpwdisplay {  
     my (%lt) = @_;      $r->print(<<ENDDOCUMENT);
     my $prompt_for_resetpw = 1;       <div style="float: left;">
     if ($prompt_for_resetpw) {       <table border="0" cellspacing="0" cellpadding="0">
         return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';  $domainrow
     }  $serverrow
     return;  $loadrow    
 }  $userloadrow
   $versionrow
 sub loginhelpdisplay {       </table>
     my (%lt) = @_;      </div>
     my $login_help = 1;      <div style="float: right;">
     if ($login_help) {      $domainlogo
     my $dom = &Apache::lonnet::default_login_domain();      </div>
  my %helpconfig = &Apache::lonnet::get_dom('configuration',['helpsettings'],$dom);      <br style="clear:both;" />
  my $loginhelp_url = $helpconfig{'helpsettings'}{'loginhelpurl'};   </div>
  if ($loginhelp_url ne '') {  
         return '<a href="'.$loginhelp_url.'">'.$lt{'help'}.'</a>';  <script type="text/javascript">
         } else {  // <![CDATA[
         return '<a href="/adm/loginproblems.html">'.$lt{'help'}.'</a>';  // the if prevents the script error if the browser can not handle this
         }  if ( document.client.uname ) { document.client.uname.focus(); }
     }  // ]]>
     return;  </script>
 }  $helpdeskscript
   
 sub coursecatalog_link {  ENDDOCUMENT
     my ($linkname) = @_;      my %endargs = ( 'noredirectlink' => 1, );
     return <<"END";      $r->print(&Apache::loncommon::end_page(\%endargs));
       <a href="/adm/coursecatalog">$linkname</a>      return OK;
 END  }
 }  
   sub check_loginvia {
 sub newuser_link {      my ($domain,$lonhost) = @_;
     my ($linkname) = @_;      if ($domain eq '' || $lonhost eq '') {
     return '<a href="/adm/createaccount">'.$linkname.'</a>';          return;
 }      }
       my %domconfhash = &Apache::loncommon::get_domainconf($domain);
 1;      my $loginvia = $domconfhash{$domain.'.login.loginvia_'.$lonhost};
 __END__      my $loginvia_exempt = $domconfhash{$domain.'.login.loginvia_exempt_'.$lonhost};
       my $output;
       if ($loginvia ne '') {
           my $noredirect;
           my $ip = $ENV{'REMOTE_ADDR'};
           if ($ip eq '127.0.0.1') {
               $noredirect = 1;
           } else {
               if ($loginvia_exempt ne '') {
                   my @exempt = split(',',$loginvia_exempt);
                   if (grep(/^\Q$ip\E$/,@exempt)) {
                       $noredirect = 1;
                   }
               }
           }
           unless ($noredirect) {
               my ($newhost,$path);
               if ($loginvia =~ /:/) {
                   ($newhost,$path) = split(':',$loginvia);
               } else {
                   $newhost = $loginvia;
               }
               if ($newhost ne $lonhost) {
                   if (&Apache::lonnet::hostname($newhost) ne '') {
                       $output = &redirect_page($newhost,$path);
                   }
               }
           }
       }
       return $output;
   }
   
   sub redirect_page {
       my ($desthost,$path) = @_;
       my $protocol = $Apache::lonnet::protocol{$desthost};
       $protocol = 'http' if ($protocol ne 'https');
       unless ($path =~ m{^/}) {
           $path = '/'.$path;
       }
       my $url = $protocol.'://'.&Apache::lonnet::hostname($desthost).$path;
       if ($env{'form.firsturl'} ne '') {
           $url .='?firsturl='.$env{'form.firsturl'};
       }
       my $start_page = &Apache::loncommon::start_page('Switching Server ...',undef,
                                                       {'redirect' => [0,$url],});
       my $end_page   = &Apache::loncommon::end_page();
       return $start_page.$end_page;
   }
   
   sub contactdisplay {
       my ($lt,$servadm,$showadminmail,$authdomain,$helpdeskscript,$showhelpdesk,
           $possdoms) = @_;
       my $contactblock;
       my $origmail;
       if (ref($possdoms) eq 'ARRAY') {
           if (grep(/^\Q$authdomain\E$/,@{$possdoms})) {
               $origmail = $Apache::lonnet::perlvar{'lonSupportEMail'};
           }
       }
       my $requestmail =
           &Apache::loncommon::build_recipient_list(undef,'helpdeskmail',
                                                    $authdomain,$origmail);
       unless ($showhelpdesk eq '0') {
           if ($requestmail =~ m/[^\@]+\@[^\@]+/) {
               $showhelpdesk = 1;
           } else {
               $showhelpdesk = 0;
           }
       }
       if ($servadm && $showadminmail) {
           $contactblock .= $$lt{'servadm'}.':<br />'.
                            '<tt>'.$servadm.'</tt><br />';
       }
       if ($showhelpdesk) {
           $contactblock .= '<a href="javascript:helpdesk()">'.$lt->{'helpdesk'}.'</a><br />';
           my $thisurl = &escape('/adm/login');
           $$helpdeskscript = <<"ENDSCRIPT";
   <script type="text/javascript">
   // <![CDATA[
   function helpdesk() {
       var possdom = document.client.udom.value;
       var codedom = possdom.replace( new RegExp("[^A-Za-z0-9.\\-]","g"),'');
       if (codedom == '') {
           codedom = "$authdomain";
       }
       var querystr = "origurl=$thisurl&codedom="+codedom;
       document.location.href = "/adm/helpdesk?"+querystr;
       return;
   }
   // ]]>
   </script>
   ENDSCRIPT
       }
       return $contactblock;
   }
   
   sub forgotpwdisplay {
       my (%lt) = @_;
       my $prompt_for_resetpw = 1;
       if ($prompt_for_resetpw) {
           return '<a href="/adm/resetpw">'.$lt{'forgotpw'}.'</a>';
       }
       return;
   }
   
   sub coursecatalog_link {
       my ($linkname) = @_;
       return <<"END";
         <a href="/adm/coursecatalog">$linkname</a>
   END
   }
   
   sub newuser_link {
       my ($linkname) = @_;
       return '<a href="/adm/createaccount">'.$linkname.'</a>';
   }
   
   1;
   __END__
Removed from v.1.133  
changed lines
  Added in v.1.163

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