--- loncom/interface/loncommon.pm	2002/07/12 14:36:16	1.46
+++ loncom/interface/loncommon.pm	2002/08/22 21:20:23	1.53.2.1
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common routines
 #
-# $Id: loncommon.pm,v 1.46 2002/07/12 14:36:16 matthew Exp $
+# $Id: loncommon.pm,v 1.53.2.1 2002/08/22 21:20:23 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -80,7 +80,7 @@ package Apache::loncommon;
 use strict;
 use Apache::lonnet();
 use GDBM_File;
-use POSIX qw(strftime);
+use POSIX qw(strftime mktime);
 use Apache::Constants qw(:common);
 use Apache::lonmsg();
 my $readit;
@@ -242,7 +242,7 @@ of the element the selection from the se
 ###############################################################
 sub browser_and_searcher_javascript {
     return <<END;
-    var editbrowser;
+    var editbrowser = null;
     function openbrowser(formname,elementname,only,omit) {
         var url = '/res/?';
         if (editbrowser == null) {
@@ -439,10 +439,12 @@ END
 
 =pod
 
-=item help_open_topic($topic, $stayOnPage, $width, $height)
+=item help_open_topic($topic, $text, $stayOnPage, $width, $height)
 
 Returns a string corresponding to an HTML link to the given help $topic, where $topic corresponds to the name of a .tex file in /home/httpd/html/adm/help/tex, with underscores replaced by spaces.
 
+$text will optionally be linked to the same topic, allowing you to link text in addition to the graphic. If you do not want to link text, but wish to specify one of the later parameters, pass an empty string.
+
 $stayOnPage is a value that will be interpreted as a boolean. If true, the link will not open a new window. If false, the link will open a new window using Javascript. (Default is false.)
 
 $width and $height are optional numerical parameters that will override the width and height of the popped up window, which may be useful for certain help topics with big pictures included.
@@ -450,33 +452,37 @@ $width and $height are optional numerica
 =cut
 
 sub help_open_topic {
-    my ($topic, $stayOnPage, $width, $height) = @_;
+    my ($topic, $text, $stayOnPage, $width, $height) = @_;
+    $text = "" if (not defined $text);
     $stayOnPage = 0 if (not defined $stayOnPage);
     $width = 350 if (not defined $width);
     $height = 400 if (not defined $height);
     my $filename = $topic;
     $filename =~ s/ /_/g;
 
-    my $template;
+    my $template = "";
+    my $link;
 
     if (!$stayOnPage)
     {
-        $template = <<"ENDTEMPLATE";
-<a href="javascript:void(open('/adm/help/${filename}.hlp', 'Help for $topic', 'menubar=0,s
-crollbars=1,width=$width,height=$height'))"><image
-  src="/adm/help/gif/smallHelp.gif"
-  border="0" alt="(Help: $topic)"></a>
-ENDTEMPLATE
+	$link = "javascript:void(open('/adm/help/${filename}.hlp', 'Help_for_$topic', 'menubar=0,toolbar=1,scrollbars=1,width=$width,height=$height'))";
     }
     else
     {
-        $template = <<"ENDTEMPLATE";
-<a href="/adm/help/${filename}.hlp"><image
-  src="/adm/help/gif/smallHelp.gif"
-  border="0" alt="(Help: $topic)"></a>
-ENDTEMPLATE
+	$link = "/adm/help/${filename}.hlp";
     }
 
+    # Add the text
+    if ($text ne "")
+    {
+	$template .= "<a href=\"$link\">$text</a> ";
+    }
+
+    # Add the graphic
+    $template .= <<"ENDTEMPLATE";
+<a href="$link"><image src="/adm/help/gif/smallHelp.gif" border="0" alt="(Help: $topic)"></a>
+ENDTEMPLATE
+
     return $template;
 
 }
@@ -552,7 +558,7 @@ sub select_dom_form {
 
 =pod
 
-=item get_home_servers($domain)
+=item get_library_servers($domain)
 
 Returns a hash which contains keys like '103l3' and values like 
 'kirk.lite.msu.edu'.  All of the keys will be for machines in the
@@ -561,15 +567,15 @@ given $domain.
 =cut
 
 #-------------------------------------------
-sub get_home_servers {
+sub get_library_servers {
     my $domain = shift;
-    my %home_servers;
+    my %library_servers;
     foreach (keys(%Apache::lonnet::libserv)) {
         if ($Apache::lonnet::hostdom{$_} eq $domain) {
-            $home_servers{$_} = $Apache::lonnet::hostname{$_};
+            $library_servers{$_} = $Apache::lonnet::hostname{$_};
         }
     }
-    return %home_servers;
+    return %library_servers;
 }
 
 #-------------------------------------------
@@ -586,7 +592,7 @@ returns a string which contains an <opti
 #-------------------------------------------
 sub home_server_option_list {
     my $domain = shift;
-    my %servers = &get_home_servers($domain);
+    my %servers = &get_library_servers($domain);
     my $result = '';
     foreach (sort keys(%servers)) {
         $result.=
@@ -749,6 +755,8 @@ sub authform_kerberos{
 Kerberos authenticated with domain
 <input type="text" size="10" name="krbarg" value=""
        onchange="javascript:changed_text('krb',$in{'formname'});">
+ <input type="radio" name="krbver" value="4" checked="on" />Version 4
+ <input type="radio" name="krbver" value="5" />Version 5
 END
     return $result;
 }
@@ -838,7 +846,7 @@ sub initialize_keywords {
     #   Set up the hash as a database
     my %thesaurus_db;
     if (! tie(%thesaurus_db,'GDBM_File',
-              $thesaurus_db_file,&GDBM_READER,0640)){
+              $thesaurus_db_file,&GDBM_READER(),0640)){
         &Apache::lonnet::logthis("Could not tie \%thesaurus_db to ".
                                  $thesaurus_db_file);
         return 0;
@@ -951,7 +959,7 @@ sub get_related_words {
         return ();
     }
     if (! tie(%thesaurus_db,'GDBM_File',
-              $thesaurus_db_file,&GDBM_READER,0640)){
+              $thesaurus_db_file,&GDBM_READER(),0640)){
         return ();
     } 
     my @Words=();
@@ -1087,7 +1095,7 @@ sub get_previous_attempt {
 	} else {
 	  $value=$lasthash{$_};
 	}
-	if ($_ =~/$regexp$/) {$value = &$gradesub($value)}
+	if ($_ =~/$regexp$/ && (defined &$gradesub)) {$value = &$gradesub($value)}
 	$prevattempts.='<td>'.$value.'&nbsp;</td>';
       }
       $prevattempts.='</tr></table></td></tr></table>';
@@ -1145,6 +1153,47 @@ sub get_student_answers {
 
 ###############################################
 
+
+sub timehash {
+    my @ltime=localtime(shift);
+    return ( 'seconds' => $ltime[0],
+             'minutes' => $ltime[1],
+             'hours'   => $ltime[2],
+             'day'     => $ltime[3],
+             'month'   => $ltime[4]+1,
+             'year'    => $ltime[5]+1900,
+             'weekday' => $ltime[6],
+             'dayyear' => $ltime[7]+1,
+             'dlsav'   => $ltime[8] );
+}
+
+sub maketime {
+    my %th=@_;
+    return POSIX::mktime(
+        ($th{'seconds'},$th{'minutes'},$th{'hours'},
+         $th{'day'},$th{'month'}-1,$th{'year'}-1900,0,0,$th{'dlsav'}));
+}
+
+
+sub findallcourses {
+    my %courses=();
+    my $now=time;
+    foreach (keys %ENV) {
+	if ($_=~/^user\.role\.\w+\.\/(\w+)\/(\w+)/) {
+	    my ($starttime,$endtime)=$ENV{$_};
+            my $active=1;
+            if ($starttime) {
+		if ($now<$starttime) { $active=0; }
+            }
+            if ($endtime) {
+                if ($now>$endtime) { $active=0; }
+            }
+            if ($active) { $courses{$1.'_'.$2}=1; }
+        }
+    }
+    return keys %courses;
+}
+
 ###############################################
 
 sub get_unprocessed_cgi {