--- loncom/interface/lonhtmlcommon.pm	2004/02/16 23:27:03	1.51
+++ loncom/interface/lonhtmlcommon.pm	2006/07/18 21:55:24	1.144
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common html routines
 #
-# $Id: lonhtmlcommon.pm,v 1.51 2004/02/16 23:27:03 albertel Exp $
+# $Id: lonhtmlcommon.pm,v 1.144 2006/07/18 21:55:24 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -55,11 +55,13 @@ html.
 
 package Apache::lonhtmlcommon;
 
+use strict;
 use Time::Local;
 use Time::HiRes;
 use Apache::lonlocal;
-use strict;
-
+use Apache::lonnet;
+use lib '/home/httpd/lib/perl/';
+use LONCAPA;
 
 ##############################################
 ##############################################
@@ -81,7 +83,7 @@ sub authorbombs {
     foreach (keys %bombs) {
 	if ($_=~/^$udom\/$uname\//) {
 	    return '<a href="/adm/bombs/'.$url.
-		'"><img src="/adm/lonMisc/bomb.gif" border="0" /></a>'.
+		'"><img src="'.&Apache::loncommon::lonhttpdurl('/adm/lonMisc/bomb.gif').'" border="0" /></a>'.
 		&Apache::loncommon::help_open_topic('About_Bombs');
 	}
     }
@@ -93,41 +95,54 @@ sub authorbombs {
 
 sub recent_filename {
     my $area=shift;
-    return 'nohist_recent_'.&Apache::lonnet::escape($area);
+    return 'nohist_recent_'.&escape($area);
 }
 
 sub store_recent {
-    my ($area,$name,$value)=@_;
+    my ($area,$name,$value,$freeze)=@_;
     my $file=&recent_filename($area);
     my %recent=&Apache::lonnet::dump($file);
-    if (scalar(keys(%recent))>10) {
+    if (scalar(keys(%recent))>20) {
 # remove oldest value
-	my $oldest=time;
+	my $oldest=time();
 	my $delkey='';
-	foreach (keys %recent) {
-	    my $thistime=(split(/\&/,$recent{$_}))[0];
-	    if ($thistime<$oldest) {
+	foreach my $item (keys(%recent)) {
+	    my $thistime=(split(/\&/,$recent{$item}))[0];
+	    if (($thistime ne "always_include") && ($thistime<$oldest)) {
 		$oldest=$thistime;
-		$delkey=$_;
+		$delkey=$item;
 	    }
 	}
 	&Apache::lonnet::del($file,[$delkey]);
     }
 # store new value
+    my $timestamp;
+    if ($freeze) {
+        $timestamp = "always_include";
+    } else {
+        $timestamp = time();
+    }   
     &Apache::lonnet::put($file,{ $name => 
-				 time.'&'.&Apache::lonnet::escape($value) });
+				 $timestamp.'&'.&escape($value) });
+}
+
+sub remove_recent {
+    my ($area,$names)=@_;
+    my $file=&recent_filename($area);
+    return &Apache::lonnet::del($file,$names);
 }
 
 sub select_recent {
     my ($area,$fieldname,$event)=@_;
     my %recent=&Apache::lonnet::dump(&recent_filename($area));
     my $return="\n<select name='$fieldname'".
-	($event?" onChange='$event'":'').
+	($event?" onchange='$event'":'').
 	">\n<option value=''>--- ".&mt('Recent')." ---</option>";
-    foreach (sort keys %recent) {
-	unless ($_=~/^error\:/) {
-	    $return.="\n<option value='$_'>".
-		&Apache::lonnet::unescape((split(/\&/,$recent{$_}))[1]).
+    foreach my $value (sort(keys(%recent))) {
+	unless ($value =~/^error\:/) {
+	    my $escaped = &Apache::loncommon::escape_url($value);
+	    $return.="\n<option value='$escaped'>".
+		&unescape((split(/\&/,$recent{$value}))[1]).
 		'</option>';
 	}
     }
@@ -135,6 +150,51 @@ sub select_recent {
     return $return;
 }
 
+sub get_recent {
+    my ($area, $n) = @_;
+    my %recent=&Apache::lonnet::dump(&recent_filename($area));
+
+# Create hash with key as time and recent as value
+# Begin filling return_hash with any 'always_include' option
+    my %time_hash = ();
+    my %return_hash = ();
+    foreach my $item (keys %recent) {
+        my ($thistime,$thisvalue)=(split(/\&/,$recent{$item}));
+        if ($thistime eq 'always_include') {
+            $return_hash{$item} = &unescape($thisvalue);
+            $n--;
+        } else {
+            $time_hash{$thistime} = $item;
+        }
+    }
+
+# Sort by decreasing time and return key value pairs
+    my $idx = 1;
+    foreach my $item (reverse(sort(keys(%time_hash)))) {
+       $return_hash{$time_hash{$item}} =
+                  &unescape((split(/\&/,$recent{$time_hash{$item}}))[1]);
+       if ($n && ($idx++ >= $n)) {last;}
+    }
+
+    return %return_hash;
+}
+
+sub get_recent_frozen {
+    my ($area) = @_;
+    my %recent=&Apache::lonnet::dump(&recent_filename($area));
+
+# Create hash with all 'frozen' items
+    my %return_hash = ();
+    foreach my $item (keys(%recent)) {
+        my ($thistime,$thisvalue)=(split(/\&/,$recent{$item}));
+        if ($thistime eq 'always_include') {
+            $return_hash{$item} = &unescape($thisvalue);
+        }
+    }
+    return %return_hash;
+}
+
+
 
 =pod
 
@@ -147,6 +207,7 @@ sub select_recent {
 sub textbox {
     my ($name,$value,$size,$special) = @_;
     $size = 40 if (! defined($size));
+    $value = &HTML::Entities::encode($value,'<>&"');
     my $Str = '<input type="text" name="'.$name.'" size="'.$size.'" '.
         'value="'.$value.'" '.$special.' />';
     return $Str;
@@ -164,9 +225,37 @@ sub textbox {
 ##############################################
 ##############################################
 sub checkbox {
-    my ($name,$value) = @_;
-    my $Str = '<input type="checkbox" name="'.$name.'"'.
-	($value?' checked="1"':'').' />';
+    my ($name,$checked,$value) = @_;
+    my $Str = '<input type="checkbox" name="'.$name.'" ';
+    if (defined($value)) {
+        $Str .= 'value="'.$value.'"';
+    } 
+    if ($checked) {
+        $Str .= ' checked="1"';
+    }
+    $Str .= ' />';
+    return $Str;
+}
+
+
+=pod
+
+=item radiobutton
+
+=cut
+
+##############################################
+##############################################
+sub radio {
+    my ($name,$checked,$value) = @_;
+    my $Str = '<input type="radio" name="'.$name.'" ';
+    if (defined($value)) {
+        $Str .= 'value="'.$value.'"';
+    } 
+    if ($checked eq $value) {
+        $Str .= ' checked="1"';
+    }
+    $Str .= ' />';
     return $Str;
 }
 
@@ -202,6 +291,13 @@ Also, to be explicit, a value of 'now' a
 Additional html/javascript to be associated with each element in
 the date_setter.  See lonparmset for example usage.
 
+=item $includeempty 
+
+=item $state
+
+Specifies the initial state of the form elements.  Either 'disabled' or empty.
+Defaults to empty, which indiciates the form elements are not disabled. 
+
 =back
 
 Bugs
@@ -213,24 +309,50 @@ The method used to restrict user input w
 ##############################################
 ##############################################
 sub date_setter {
-    my ($formname,$dname,$currentvalue,$special,$includeempty) = @_;
-    if (! defined($currentvalue) || $currentvalue eq 'now') {
-	unless ($includeempty) {
-	    $currentvalue = time;
-	} else {
+    my ($formname,$dname,$currentvalue,$special,$includeempty,$state,
+        $no_hh_mm_ss,$defhour,$defmin,$defsec,$nolink) = @_;
+    my $wasdefined=1;
+    if (! defined($state) || $state ne 'disabled') {
+        $state = '';
+    }
+    if (! defined($no_hh_mm_ss)) {
+        $no_hh_mm_ss = 0;
+    }
+    if ($currentvalue eq 'now') {
+	$currentvalue=time;
+    }
+    if ((!defined($currentvalue)) || ($currentvalue eq '')) {
+	$wasdefined=0;
+	if ($includeempty) {
 	    $currentvalue = 0;
+	} else {
+	    $currentvalue = time;
 	}
     }
     # other potentially useful values:     wkday,yrday,is_daylight_savings
-    my ($sec,$min,$hour,$mday,$month,$year)=('','','','','','');
+    my ($sec,$min,$hour,$mday,$month,$year)=('','',undef,'','','');
     if ($currentvalue) {
 	($sec,$min,$hour,$mday,$month,$year,undef,undef,undef) = 
 	    localtime($currentvalue);
 	$year += 1900;
     }
+    unless ($wasdefined) {
+	if (($defhour) || ($defmin) || ($defsec)) {
+	    ($sec,$min,$hour,$mday,$month,$year,undef,undef,undef) = 
+		localtime(time);
+	    $year += 1900;
+	    $sec=($defsec?$defsec:0);
+	    $min=($defmin?$defmin:0);
+	    $hour=($defhour?$defhour:0);
+	} elsif (!$includeempty) {
+	    $sec=0;
+	    $min=0;
+	    $hour=0;
+	}
+    }
     my $result = "\n<!-- $dname date setting form -->\n";
     $result .= <<ENDJS;
-<script language="Javascript">
+<script type="text/javascript">
     function $dname\_checkday() {
         var day   = document.$formname.$dname\_day.value;
         var month = document.$formname.$dname\_month.value;
@@ -261,45 +383,66 @@ sub date_setter {
             document.$formname.$dname\_day.value = 30;
         }
     }
+    
+    function $dname\_disable() {
+        document.$formname.$dname\_month.disabled=true;
+        document.$formname.$dname\_day.disabled=true;
+        document.$formname.$dname\_year.disabled=true;
+        document.$formname.$dname\_hour.disabled=true;
+        document.$formname.$dname\_minute.disabled=true;
+        document.$formname.$dname\_second.disabled=true;
+    }
+
+    function $dname\_enable() {
+        document.$formname.$dname\_month.disabled=false;
+        document.$formname.$dname\_day.disabled=false;
+        document.$formname.$dname\_year.disabled=false;
+        document.$formname.$dname\_hour.disabled=false;
+        document.$formname.$dname\_minute.disabled=false;
+        document.$formname.$dname\_second.disabled=false;        
+    }
 
     function $dname\_opencalendar() {
-       var calwin=window.open(
+        if (! document.$formname.$dname\_month.disabled) {
+            var calwin=window.open(
 "/adm/announcements?pickdate=yes&formname=$formname&element=$dname&month="+
 document.$formname.$dname\_month.value+"&year="+
 document.$formname.$dname\_year.value,
              "LONCAPAcal",
               "height=350,width=350,scrollbars=yes,resizable=yes,menubar=no");
+        }
 
     }
 </script>
 ENDJS
-    $result .= "  <nobr><select name=\"$dname\_month\" ".$special.' '.
-        "onChange=\"javascript:$dname\_checkday()\" >\n";
+    $result .= '  <span style="white-space: nowrap;">';
+    my $monthselector = qq{<select name="$dname\_month" $special $state onchange="javascript:$dname\_checkday()" >};
+    # Month
     my @Months = qw/January February  March     April   May      June 
                     July    August    September October November December/;
     # Pad @Months with a bogus value to make indexing easier
     unshift(@Months,'If you can read this an error occurred');
-    if ($includeempty) { $result.="<option value=''></option>"; }
+    if ($includeempty) { $monthselector.="<option value=''></option>"; }
     for(my $m = 1;$m <=$#Months;$m++) {
-        $result .= "      <option value=\"$m\" ";
-        $result .= "selected " if ($m-1 eq $month);
-        $result .= "> ".&mt($Months[$m])." </option>\n";
-    }
-    $result .= "  </select>\n";
-    $result .= "  <input type=\"text\" name=\"$dname\_day\" ".
-            "value=\"$mday\" size=\"3\" ".$special.' '.
-            "onChange=\"javascript:$dname\_checkday()\" />\n";
-    $result .= "  <input type=\"year\" name=\"$dname\_year\" ".
-            "value=\"$year\" size=\"5\" ".$special.' '.
-            "onChange=\"javascript:$dname\_checkday()\" />\n";
-    $result .= "&nbsp;&nbsp;";
-    $result .= "  <select name=\"$dname\_hour\" ".$special." >\n";
-    if ($includeempty) { $result.="<option value=''></option>"; }
+        $monthselector .= qq{      <option value="$m" };
+        $monthselector .= "selected " if ($m-1 eq $month);
+        $monthselector .= '> '.&mt($Months[$m]).' </option>';
+    }
+    $monthselector.= '  </select>';
+    # Day
+    my $dayselector = qq{<input type="text" name="$dname\_day" $state value="$mday" size="3" $special onchange="javascript:$dname\_checkday()" />};
+    # Year
+    my $yearselector = qq{<input type="year" name="$dname\_year" $state value="$year" size="5" $special onchange="javascript:$dname\_checkday()" />};
+    #
+    my $hourselector = qq{<select name="$dname\_hour" $special $state >};
+    if ($includeempty) { 
+        $hourselector.=qq{<option value=''></option>};
+    }
     for (my $h = 0;$h<24;$h++) {
-        $result .= "      <option value=\"$h\" ";
-        $result .= "selected " if ($hour == $h);
-        $result .= "> ";
-	my $timest='';
+        $hourselector .= qq{<option value="$h" };
+        $hourselector .= "selected " if (defined($hour) && $hour == $h);
+        $hourselector .= ">";
+        my $timest='';
         if ($h == 0) {
             $timest .= "12 am";
         } elsif($h == 12) {
@@ -309,16 +452,32 @@ ENDJS
         } else {
             $timest .= $h-12 ." pm";
         }
-	$timest=&mt($timest);
-        $result .= $timest." </option>\n";
-    } 
-    $result .= "  </select>\n";
-    $result .= "  <input type=\"text\" name=\"$dname\_minute\" ".$special.' '.
-        "value=\"$min\" size=\"3\" /> m\n";
-    $result .= "  <input type=\"text\" name=\"$dname\_second\" ".$special.' '.
-        "value=\"$sec\" size=\"3\" /> s\n";
-    $result .= "<a href=\"javascript:$dname\_opencalendar()\">".
-    &mt('Select Date')."</a></nobr>\n<!-- end $dname date setting form -->\n";
+        $timest=&mt($timest);
+        $hourselector .= $timest." </option>\n";
+    }
+    $hourselector .= "  </select>\n";
+    my $minuteselector = qq{<input type="text" name="$dname\_minute" $special $state value="$min" size="3" />};
+    my $secondselector= qq{<input type="text" name="$dname\_second" $special $state value="$sec" size="3" />};
+    my $cal_link;
+    if (!$nolink) {
+        $cal_link = qq{<a href="javascript:$dname\_opencalendar()">};
+    }
+    #
+    if ($no_hh_mm_ss) {
+        $result .= &mt('[_1] [_2] [_3] ',
+                       $monthselector,$dayselector,$yearselector);
+        if (!$nolink) {
+            $result .= &mt('[_1]Select Date[_2]',$cal_link,'</a>');
+        }
+    } else {
+        $result .= &mt('[_1] [_2] [_3] [_4] [_5]m [_6]s ',
+                      $monthselector,$dayselector,$yearselector,
+                      $hourselector,$minuteselector,$secondselector);
+        if (!$nolink) {
+            $result .= &mt('[_1]Select Date[_2]',$cal_link,'</a>');
+        }
+    }
+    $result .= "</span>\n<!-- end $dname date setting form -->\n";
     return $result;
 }
 
@@ -355,38 +514,46 @@ sub get_date_from_form {
     my ($dname) = @_;
     my ($sec,$min,$hour,$day,$month,$year);
     #
-    if (defined($ENV{'form.'.$dname.'_second'})) {
-        my $tmpsec = $ENV{'form.'.$dname.'_second'};
+    if (defined($env{'form.'.$dname.'_second'})) {
+        my $tmpsec = $env{'form.'.$dname.'_second'};
         if (($tmpsec =~ /^\d+$/) && ($tmpsec >= 0) && ($tmpsec < 60)) {
             $sec = $tmpsec;
         }
+	if (!defined($tmpsec) || $tmpsec eq '') { $sec = 0; }
+    } else {
+        $sec = 0;
     }
-    if (defined($ENV{'form.'.$dname.'_minute'})) {
-        my $tmpmin = $ENV{'form.'.$dname.'_minute'};
+    if (defined($env{'form.'.$dname.'_minute'})) {
+        my $tmpmin = $env{'form.'.$dname.'_minute'};
         if (($tmpmin =~ /^\d+$/) && ($tmpmin >= 0) && ($tmpmin < 60)) {
             $min = $tmpmin;
         }
+	if (!defined($tmpmin) || $tmpmin eq '') { $min = 0; }
+    } else {
+        $min = 0;
     }
-    if (defined($ENV{'form.'.$dname.'_hour'})) {
-        my $tmphour = $ENV{'form.'.$dname.'_hour'};
+    if (defined($env{'form.'.$dname.'_hour'})) {
+        my $tmphour = $env{'form.'.$dname.'_hour'};
         if (($tmphour =~ /^\d+$/) && ($tmphour >= 0) && ($tmphour < 24)) {
             $hour = $tmphour;
         }
+    } else {
+        $hour = 0;
     }
-    if (defined($ENV{'form.'.$dname.'_day'})) {
-        my $tmpday = $ENV{'form.'.$dname.'_day'};
+    if (defined($env{'form.'.$dname.'_day'})) {
+        my $tmpday = $env{'form.'.$dname.'_day'};
         if (($tmpday =~ /^\d+$/) && ($tmpday > 0) && ($tmpday < 32)) {
             $day = $tmpday;
         }
     }
-    if (defined($ENV{'form.'.$dname.'_month'})) {
-        my $tmpmonth = $ENV{'form.'.$dname.'_month'};
+    if (defined($env{'form.'.$dname.'_month'})) {
+        my $tmpmonth = $env{'form.'.$dname.'_month'};
         if (($tmpmonth =~ /^\d+$/) && ($tmpmonth > 0) && ($tmpmonth < 13)) {
             $month = $tmpmonth - 1;
         }
     }
-    if (defined($ENV{'form.'.$dname.'_year'})) {
-        my $tmpyear = $ENV{'form.'.$dname.'_year'};
+    if (defined($env{'form.'.$dname.'_year'})) {
+        my $tmpyear = $env{'form.'.$dname.'_year'};
         if (($tmpyear =~ /^\d+$/) && ($tmpyear > 1900)) {
             $year = $tmpyear - 1900;
         }
@@ -394,7 +561,7 @@ sub get_date_from_form {
     if (($year<70) || ($year>137)) { return undef; }
     if (defined($sec) && defined($min)   && defined($hour) &&
         defined($day) && defined($month) && defined($year) &&
-        eval(&timelocal($sec,$min,$hour,$day,$month,$year))) {
+        eval('&timelocal($sec,$min,$hour,$day,$month,$year)')) {
         return &timelocal($sec,$min,$hour,$day,$month,$year);
     } else {
         return undef;
@@ -417,11 +584,13 @@ parameter setting wizard.
 ##############################################
 sub pjump_javascript_definition {
     my $Str = <<END;
-    function pjump(type,dis,value,marker,ret,call) {
+    function pjump(type,dis,value,marker,ret,call,hour,min,sec) {
         parmwin=window.open("/adm/rat/parameter.html?type="+escape(type)
                  +"&value="+escape(value)+"&marker="+escape(marker)
                  +"&return="+escape(ret)
-                 +"&call="+escape(call)+"&name="+escape(dis),"LONCAPAparms",
+                 +"&call="+escape(call)+"&name="+escape(dis)
+                 +"&defhour="+escape(hour)+"&defmin="+escape(min)
+                 +"&defsec="+escape(sec),"LONCAPAparms",
                  "height=350,width=350,scrollbars=no,menubar=no");
     }
 END
@@ -448,8 +617,8 @@ sub javascript_nothing {
     my $nothing = "''";
     my $user_browser;
     my $user_os;
-    $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
-    $user_os      = $ENV{'browser.os'}   if (exists($ENV{'browser.os'}));
+    $user_browser = $env{'browser.type'} if (exists($env{'browser.type'}));
+    $user_os      = $env{'browser.os'}   if (exists($env{'browser.os'}));
     if (! defined($user_browser) || ! defined($user_os)) {
         (undef,$user_browser,undef,undef,undef,$user_os) = 
                            &Apache::loncommon::decode_user_agent();
@@ -460,6 +629,27 @@ sub javascript_nothing {
     return $nothing;
 }
 
+##############################################
+##############################################
+sub javascript_docopen {
+    # safari does not understand document.open() and loads "text/html"
+    my $nothing = "''";
+    my $user_browser;
+    my $user_os;
+    $user_browser = $env{'browser.type'} if (exists($env{'browser.type'}));
+    $user_os      = $env{'browser.os'}   if (exists($env{'browser.os'}));
+    if (! defined($user_browser) || ! defined($user_os)) {
+        (undef,$user_browser,undef,undef,undef,$user_os) = 
+                           &Apache::loncommon::decode_user_agent();
+    }
+    if ($user_browser eq 'safari' && $user_os =~ 'mac') {
+        $nothing = "document.clear()";
+    } else {
+	$nothing = "document.open('text/html','replace')";
+    }
+    return $nothing;
+}
+
 
 ##############################################
 ##############################################
@@ -474,7 +664,7 @@ enrollment status of students.  The sele
 Inputs:
 
 $status: the currently selected status.  If undefined the value of
-$ENV{'form.Status'} is taken.  If that is undefined, a value of 'Active'
+$env{'form.Status'} is taken.  If that is undefined, a value of 'Active'
 is used.
 
 $formname: The name of the form.  If defined the onchange attribute of
@@ -496,7 +686,7 @@ sub StatusOptions {
     $size = 1 if (!defined($size));
     if (! defined($status)) {
         $status = 'Active';
-        $status = $ENV{'form.Status'} if (exists($ENV{'form.Status'}));
+        $status = $env{'form.Status'} if (exists($env{'form.Status'}));
     }
 
     my $OpSel1 = '';
@@ -650,19 +840,25 @@ sub Create_PrgWin {
     $prog_state{'type'}=$type;
     if ($type eq 'popup') {
 	$prog_state{'window'}='popwin';
+	my $start_page =
+	    &Apache::loncommon::start_page($title,undef,
+					   {'only_body' => 1,
+					    'bgcolor'   => '#88DDFF',
+					    'js_ready'  => 1});
+	my $end_page = &Apache::loncommon::end_page({'js_ready'  => 1});
+
 	#the whole function called through timeout is due to issues
 	#in mozilla Read BUG #2665 if you want to know the whole story
-	&r_print($r,'<script>'.
+	&r_print($r,'<script type="text/javascript">'.
         "var popwin;
          function openpopwin () {
          popwin=open(\'\',\'popwin\',\'width=400,height=100\');".
-        "popwin.document.writeln(\'<html><head><title>$title</title></head>".
-	      "<body bgcolor=\"#88DDFF\">".
-              "<h4>$heading</h4>".
-              "<form name=popremain>".
+        "popwin.document.writeln(\'".$start_page.
+              "<h4>$heading<\/h4>".
+              "<form name=\"popremain\" method=\"post\">".
               '<input type="text" size="'.$width.'" name="remaining" value="'.
-	      &mt('Starting').'"></form>'.
-              "</body></html>\');".
+	      &mt('Starting').'" /><\\/form>'.$end_page.
+              "\');".
         "popwin.document.close();}".
         "\nwindow.setTimeout(openpopwin,0)</script>");
 	$prog_state{'formname'}='popremain';
@@ -677,7 +873,7 @@ sub Create_PrgWin {
 	}
 	if (!$inputname) {
 	    $prog_state{'inputname'}=&get_uniq_name();
-	    &r_print($r,'<input type="text" name="'.$prog_state{'inputname'}.
+	    &r_print($r,$heading.' <input type="text" name="'.$prog_state{'inputname'}.
 		     '" size="'.$width.'" />');
 	} else {
 	    $prog_state{'inputname'}=$inputname;
@@ -713,20 +909,24 @@ sub Increment_PrgWin {
         $$prog_state{'done'} *
 	($$prog_state{'max'}-$$prog_state{'done'});
     $time_est = int($time_est);
-    if (int ($time_est/60) > 0) {
-	my $min = int($time_est/60);
-	my $sec = $time_est % 60;
-	$time_est = $min.' '.&mt('minutes');
-        if ($min < 10)  {
-            if ($sec > 1) {
-                $time_est.= ', '.$sec.' '.&mt('seconds');
-            } elsif ($sec > 0) {
-                $time_est.= ', '.$sec.' '.&mt('second');
-            }
-        }
-    } else {
-	$time_est .= ' '.&mt('seconds');
+    #
+    my $min = int($time_est/60);
+    my $sec = $time_est % 60;
+    # 
+    my $str;
+    if ($min == 0 && $sec > 1) {
+        $str = '[_2] seconds';
+    } elsif ($min == 1 && $sec > 1) {
+        $str = '1 minute [_2] seconds';
+    } elsif ($min == 1 && $sec < 2) {
+        $str = '1 minute';
+    } elsif ($min < 10 && $sec > 1) {
+        $str = '[_1] minutes, [_2] seconds';
+    } elsif ($min >= 10 || $sec < 2) {
+        $str = '[_1] minutes';
     }
+    $time_est = &mt($str,$min,$sec);
+    #
     my $lasttime = &Time::HiRes::time()-$$prog_state{'laststart'};
     if ($lasttime > 9) {
         $lasttime = int($lasttime);
@@ -741,8 +941,8 @@ sub Increment_PrgWin {
         $lasttime = '('.$lasttime.' '.&mt('seconds for').' '.$extraInfo.')';
     }
     #
-    my $user_browser = $ENV{'browser.type'} if (exists($ENV{'browser.type'}));
-    my $user_os      = $ENV{'browser.os'}   if (exists($ENV{'browser.os'}));
+    my $user_browser = $env{'browser.type'} if (exists($env{'browser.type'}));
+    my $user_os      = $env{'browser.os'}   if (exists($env{'browser.os'}));
     if (! defined($user_browser) || ! defined($user_os)) {
         (undef,$user_browser,undef,undef,undef,$user_os) = 
                            &Apache::loncommon::decode_user_agent();
@@ -782,27 +982,819 @@ sub r_print {
 # ------------------------------------------------------- Puts directory header
 
 sub crumbs {
-    my ($uri,$target,$prefix,$form)=@_;
-    my $output='<br /><tt><b><font size="+2">'.$prefix.'/';
-    if ($ENV{'user.adv'}) {
+    my ($uri,$target,$prefix,$form,$size,$noformat,$skiplast)=@_;
+    if (! defined($size)) {
+        $size = '+2';
+    }
+    if ($target) {
+        $target = ' target="'.
+                  &Apache::loncommon::escape_single($target).'"';
+    }
+    my $output='';
+    unless ($noformat) { $output.='<br /><tt><b>'; }
+    $output.='<font size="'.$size.'">'.$prefix.'/';
+    if ($env{'user.adv'}) {
 	my $path=$prefix.'/';
-	foreach (split('/',$uri)) {
-	    unless ($_) { next; }
-	    $path.=$_;
-	    unless ($path eq $uri) { $path.='/'; }
-	    my $linkpath=$path;
-	    if ($form) {
-		$linkpath="javascript:$form.action='$path';$form.submit();";
+	foreach my $dir (split('/',$uri)) {
+            if (! $dir) { next; }
+            $path .= $dir;
+	    if ($path eq $uri) {
+		if ($skiplast) {
+		    $output.=$dir;
+                    last;
+		} 
+	    } else {
+		$path.='/'; 
 	    }
-	    $output.='<a href="'.$linkpath.'"'.($target?' target="'.$target.'"':'').'>'.$_.'</a>/';
+            my $linkpath = &Apache::loncommon::escape_single($path);
+            if ($form) {
+		$linkpath=
+                    qq{javascript:$form.action='$linkpath';$form.submit();};
+            }
+	    $output.=qq{<a href="$linkpath" $target>$dir</a>/};
 	}
     } else {
 	$output.=$uri;
     }
     unless ($uri=~/\/$/) { $output=~s/\/$//; }
-    return $output.'</font></b></tt><br />';
+    return $output.'</font>'.($noformat?'':'</b></tt><br />');
+}
+
+# --------------------- A function that generates a window for the spellchecker
+
+sub spellheader {
+    my $start_page=
+	&Apache::loncommon::start_page('Speller Suggestions',undef,
+				       {'only_body'   => 1,
+					'js_ready'    => 1,
+					'bgcolor'     => '#DDDDDD',
+				        'add_entries' => {
+					    'onload' => 
+                                               'document.forms.spellcheckform.submit()',
+                                             }
+				        });
+    my $end_page=
+	&Apache::loncommon::end_page({'js_ready'  => 1}); 
+
+    my $nothing=&javascript_nothing();
+    return (<<ENDCHECK);
+<script type="text/javascript"> 
+//<!-- BEGIN LON-CAPA Internal
+var checkwin;
+
+function spellcheckerwindow(string) {
+    var esc_string = string.replace(/\"/g,'&quot;');
+    checkwin=window.open($nothing,'spellcheckwin','height=320,width=280,resizable=yes,scrollbars=yes,location=no,menubar=no,toolbar=no');
+    checkwin.document.writeln('$start_page<form name="spellcheckform" action="/adm/spellcheck" method="post"><input type="hidden" name="text" value="'+esc_string+'" /><\/form>$end_page');
+    checkwin.document.close();
+}
+// END LON-CAPA Internal -->
+</script>
+ENDCHECK
+}
+
+# ---------------------------------- Generate link to spell checker for a field
+
+sub spelllink {
+    my ($form,$field)=@_;
+    my $linktext=&mt('Check Spelling');
+    return (<<ENDLINK);
+<a href="javascript:if (typeof(document.$form.onsubmit)!='undefined') { if (document.$form.onsubmit!=null) { document.$form.onsubmit();}};spellcheckerwindow(this.document.forms.$form.$field.value);">$linktext</a>
+ENDLINK
+}
+
+# ------------------------------------------------- Output headers for HTMLArea
+
+{
+    my @htmlareafields;
+    sub init_htmlareafields {
+	undef(@htmlareafields);
+    }
+    
+    sub add_htmlareafields {
+	my (@newfields) = @_;
+	push(@htmlareafields,@newfields);
+    }
+
+    sub get_htmlareafields {
+	return @htmlareafields;
+    }
+}
+
+sub htmlareaheaders {
+    if (&htmlareablocked()) { return ''; }
+    unless (&htmlareabrowser()) { return ''; }
+    my $lang='en';
+    if (&mt('htmlarea_lang') ne 'htmlarea_lang') {
+	$lang=&mt('htmlarea_lang');
+    }
+    return (<<ENDHEADERS);
+<script type="text/javascript">
+_editor_url='/htmlarea/';
+_editor_lang='$lang';
+</script>
+<script type="text/javascript" src="/htmlarea/htmlarea.js"></script>
+ENDHEADERS
+}
+
+# ------------------------------------------------- Activate additional buttons
+
+sub htmlareaaddbuttons {
+    if (&htmlareablocked()) { return ''; }
+    unless (&htmlareabrowser()) { return ''; }
+    return (<<ENDADDBUTTON);
+    var config=new HTMLArea.Config();
+    config.registerButton('ed_math','LaTeX Inline',
+			  '/htmlarea/images/ed_math.gif',false,
+			    function(editor,id) {
+			      editor.surroundHTML('&nbsp;<m>\$','\$</m>&nbsp;');
+			    }
+			  );
+    config.registerButton('ed_math_eqn','LaTeX Equation',
+			  '/htmlarea/images/ed_math_eqn.gif',false,
+			    function(editor,id) {
+			      editor.surroundHTML(
+				     '&nbsp;\\n<center><m>\\\\[','\\\\]</m></center>\\n&nbsp;');
+			    }
+			  );
+    config.toolbar.push(['ed_math','ed_math_eqn']);
+ENDADDBUTTON
+}
+
+# ----------------------------------------------------------------- Preferences
+
+sub disablelink {
+    my @fields=@_;
+    if (defined($#fields)) {
+	unless ($#fields>=0) { return ''; }
+    }
+    return '<a href="'.&HTML::Entities::encode('/adm/preferences?action=set_wysiwyg&wysiwyg=off&returnurl=','<>&"').&escape($ENV{'REQUEST_URI'}).'">'.&mt('Disable WYSIWYG Editor').'</a>';
+}
+
+sub enablelink {
+    my @fields=@_;
+    if (defined($#fields)) {
+	unless ($#fields>=0) { return ''; }
+    }
+    return '<a href="'.&HTML::Entities::encode('/adm/preferences?action=set_wysiwyg&wysiwyg=on&returnurl=','<>&"').&escape($ENV{'REQUEST_URI'}).'">'.&mt('Enable WYSIWYG Editor').'</a>';
+}
+
+# ----------------------------------------- Script to activate only some fields
+
+sub htmlareaselectactive {
+    my @fields=@_;
+    unless (&htmlareabrowser()) { return ''; }
+    if (&htmlareablocked()) { return '<br />'.&enablelink(@fields); }
+    my $output='<script type="text/javascript" defer="1">'.
+	&htmlareaaddbuttons();
+    foreach(@fields) {
+	$output.="\nHTMLArea.replace('$_',config);";
+    }
+    $output.="\nwindow.status='Activated Editfields';\n</script><br />".
+	&disablelink(@fields);
+    return $output;
+}
+
+# --------------------------------------------------------------------- Blocked
+
+sub htmlareablocked {
+    unless ($env{'environment.wysiwygeditor'} eq 'on') { return 1; }
+    return 0;
+}
+
+# ---------------------------------------- Browser capable of running HTMLArea?
+
+sub htmlareabrowser {
+    return 1;
+}
+
+############################################################
+############################################################
+
+=pod
+
+=item breadcrumbs
+
+Compiles the previously registered breadcrumbs into an series of links.
+FAQ and BUG links will be placed on the left side of the table if they
+are defined for the last registered breadcrumb.  
+Additionally supports a 'component', which will be displayed on the
+right side of the table (without a link).
+A link to help for the component will be included if one is specified.
+
+All inputs can be undef without problems.
+
+Inputs: $component (the large text on the right side of the table),
+        $component_help
+        $menulink (boolean, controls whether to include a link to /adm/menu)
+        $helplink (if 'nohelp' don't include the orange help link)
+        $css_class (optional name for the class to apply to the table for CSS)
+Returns a string containing breadcrumbs for the current page.
+
+=item clear_breadcrumbs
+
+Clears the previously stored breadcrumbs.
+
+=item add_breadcrumb
+
+Pushes a breadcrumb on the stack of crumbs.
+
+input: $breadcrumb, a hash reference.  The keys 'href','title', and 'text'
+are required.  If present the keys 'faq' and 'bug' will be used to provide
+links to the FAQ and bug sites.
+
+returns: nothing    
+
+=cut
+
+############################################################
+############################################################
+{
+    my @Crumbs;
+    
+    sub breadcrumbs {
+        my ($component,$component_help,$menulink,$helplink,$css_class) = @_;
+        #
+	$css_class ||= 'LC_breadcrumbs';
+        my $Str = "\n".'<table class="'.$css_class.'"><tr><td>';
+        #
+        # Make the faq and bug data cascade
+        my $faq = '';
+        my $bug = '';
+	my $help='';
+        # The last breadcrumb does not have a link, so handle it separately.
+        my $last = pop(@Crumbs);
+        #
+        # The first one should be the course or a menu link
+	if (!defined($menulink)) { $menulink=1; }
+        if ($menulink) {
+            my $description = 'Menu';
+            if (exists($env{'request.course.id'}) && 
+                $env{'request.course.id'} ne '') {
+                $description = 
+                    $env{'course.'.$env{'request.course.id'}.'.description'};
+            }
+            unshift(@Crumbs,{
+                    href   =>'/adm/menu',
+                    title  =>'Go to main menu',
+                    target =>'_top',
+                    text   =>$description,
+                });
+        }
+        my $links .= 
+            join('-&gt;',
+                 map {
+                     $faq = $_->{'faq'} if (exists($_->{'faq'}));
+                     $bug = $_->{'bug'} if (exists($_->{'bug'}));
+                     $help = $_->{'help'} if (exists($_->{'help'}));
+                     my $result = '<a href="'.$_->{'href'}.'" ';
+                     if (defined($_->{'target'}) && $_->{'target'} ne '') {
+                         $result .= 'target="'.$_->{'target'}.'" ';
+                     }
+                     $result .='title="'.&mt($_->{'title'}).'">'.
+                         &mt($_->{'text'}).'</a>';
+                     $result;
+                     } @Crumbs
+                 );
+        $links .= '-&gt;' if ($links ne '');
+        $links .= '<b>'.&mt($last->{'text'}).'</b>';
+        #
+        my $icons = '';
+        $faq = $last->{'faq'} if (exists($last->{'faq'}));
+        $bug = $last->{'bug'} if (exists($last->{'bug'}));
+        $help = $last->{'help'} if (exists($last->{'help'}));
+        $component_help=($component_help?$component_help:$help);
+        if ($faq ne '') {
+            $icons .= &Apache::loncommon::help_open_faq($faq);
+        }
+#        if ($bug ne '') {
+#            $icons .= &Apache::loncommon::help_open_bug($bug);
+#        }
+	if ($faq ne '' || $component_help ne '' || $bug ne '') {
+	    $icons .= &Apache::loncommon::help_open_menu($component,
+							 $component_help,
+							 $faq,$bug);
+	}
+        #
+        $Str .= $links.'</td>';
+        #
+        if (defined($component)) {
+            $Str .= '<td class="'.$css_class.'_component">'.
+                &mt($component);
+	    if ($icons ne '') {
+		$Str .= '&nbsp;'.$icons;
+	    }
+	    $Str .= '</td>';
+        }
+        $Str .= '</tr></table>'."\n";
+        #
+        # Return the @Crumbs stack to what we started with
+        push(@Crumbs,$last);
+        shift(@Crumbs);
+        #
+        return $Str;
+    }
+
+    sub clear_breadcrumbs {
+        undef(@Crumbs);
+    }
+
+    sub add_breadcrumb {
+        push (@Crumbs,@_);
+    }
+
+} # End of scope for @Crumbs
+
+############################################################
+############################################################
+
+# Nested table routines.
+#
+# Routines to display form items in a multi-row table with 2 columns.
+# Uses nested tables to divide form elements into segments.
+# For examples of use see loncom/interface/lonnotify.pm 
+#
+# Can be used in following order: ...
+# &start_pick_box()
+# row1
+# row2
+# row3   ... etc.
+# &submit_row(0
+# &end_pickbox()
+#
+# where row1, row 2 etc. are chosen from &role_select_row,&course_select_row,
+# &status_select_row and &email_default_row
+#
+# Can also be used in following order:
+#
+# &start_pick_box()
+# &row_title()
+# &row_closure()
+# &row_title()
+# &row_closure()  ... etc.
+# &submit_row()
+# &end_pick_box()
+#
+# In general a &submit_row() call should proceed the call to &end_pick_box(),
+# as this routine adds a button for form submission.
+# &submit_row() does not require a &row_closure after it.
+#  
+# &start_pick_box() creates a bounding table with 1-pixel wide black border.
+# rows should be placed between calls to &start_pick_box() and &end_pick_box.
+#
+# &row_title() adds a title in the left column for each segment.
+# &row_closure() closes a row with a 1-pixel wide black line.
+#
+# &role_select_row() provides a select box from which to choose 1 or more roles 
+# &course_select_row provides ways of picking groups of courses
+#    radio buttons: all, by category or by picking from a course picker pop-up
+#      note: by category option is only displayed if a domain has implemented 
+#                selection by year, semester, department, number etc.
+#
+# &status_select_row() provides a select box from which to choose 1 or more
+#  access types (current access, prior access, and future access)  
+#
+# &email_default_row() provides text boxes for default e-mail suffixes for
+#  different authentication types in a domain.
+#
+# &row_title() and &row_closure() are called internally by the &*_select_row
+# routines, but can also be called directly to start and end rows which have 
+# needs that are not accommodated by the *_select_row() routines.    
+
+sub start_pick_box {
+    my ($css_class) = @_;
+    if (defined($css_class)) {
+	$css_class = 'class="'.$css_class.'"';
+    } else {
+	$css_class= 'class="LC_pick_box"';
+    }
+    my $output = <<"END";
+ <table $css_class>
+END
+    return $output;
+}
+
+sub end_pick_box {
+    my $output = <<"END";
+       </table>
+END
+    return $output;
+}
+
+sub row_title {
+    my ($title,$css_title_class,$css_value_class) = @_;
+    $css_title_class ||= 'LC_pick_box_title';
+    $css_title_class = 'class="'.$css_title_class.'"';
+
+    $css_value_class ||= 'LC_pick_box_value';
+    $css_value_class = 'class="'.$css_value_class.'"';
+
+    my $output = <<"ENDONE";
+           <tr class="LC_pick_box_row">
+            <td $css_title_class>
+	       $title:
+            </td>
+            <td $css_value_class>
+ENDONE
+    return $output;
+}
+
+sub row_closure {
+    my ($no_separator) =@_;
+    my $output = <<"ENDTWO";
+            </td>
+           </tr>
+ENDTWO
+    if (!$no_separator) {
+        $output .= <<"ENDTWO";
+           <tr>
+            <td colspan="2" class="LC_pick_box_separator">
+            </td>
+           </tr>
+ENDTWO
+    }
+    return $output;
+}
+
+sub role_select_row {
+    my ($roles,$title,$css_class) = @_;
+    my $output;
+    if (defined($title)) {
+        $output = &row_title($title,$css_class);
+    }
+    $output .= qq|
+                                  <select name="roles" multiple >\n|;
+    foreach my $role (@$roles) {
+        my $plrole;
+        if ($role eq 'ow') {
+            $plrole = &mt('Course Owner');
+        } else {
+            $plrole=&Apache::lonnet::plaintext($role);
+        }
+        $output .= '  <option value="'.$role.'">'.$plrole.'</option>';
+    }
+    $output .= qq|                </select>\n|;
+    if (defined($title)) {
+        $output .= &row_closure();
+    }
+    return $output;
+}
+
+sub course_select_row {
+    my ($title,$formname,$totcodes,$codetitles,$idlist,$idlist_titles,
+	$css_class) = @_;
+    my $output = &row_title($title,$css_class);
+    $output .= qq|
+<script type="text/javascript">
+    function coursePick (formname) {
+        for  (var i=0; i<formname.coursepick.length; i++) {
+            if (formname.coursepick[i].value == 'category') {
+                courseSet('');
+            }
+            if (!formname.coursepick[i].checked) {
+                if (formname.coursepick[i].value == 'specific') {
+                    formname.coursetotal.value = 0;
+                    formname.courselist = '';
+                }
+            }
+        }
+    }
+    function setPick (formname) {
+        for  (var i=0; i<formname.coursepick.length; i++) {
+            if (formname.coursepick[i].value == 'category') {
+                formname.coursepick[i].checked = true;
+            }
+            formname.coursetotal.value = 0;
+            formname.courselist = '';
+        }
+    }
+</script>
+    |;
+    my $courseform='<b>'.&Apache::loncommon::selectcourse_link
+                     ($formname,'pickcourse','pickdomain','coursedesc','',1).'</b>';
+        $output .= '<input type="radio" name="coursepick" value="all" onclick="coursePick(this.form)" />'.&mt('All courses').'<br />';
+    if ($totcodes > 0) {
+        my $numtitles = @$codetitles;
+        if ($numtitles > 0) {
+            $output .= '<input type="radio" name="coursepick" value="category" onclick="coursePick(this.form);alert('."'".&mt('Choose categories, from left to right')."'".')" />'.&mt('Pick courses by category:').' <br />';
+            $output .= '<table><tr><td>'.$$codetitles[0].'<br />'."\n".
+               '<select name="'.$$codetitles[0].
+               '" onChange="setPick(this.form);courseSet('."'$$codetitles[0]'".')">'."\n".
+               ' <option value="-1" />Select'."\n";
+            my @items = ();
+            my @longitems = ();
+            if ($$idlist{$$codetitles[0]} =~ /","/) {
+                @items = split(/","/,$$idlist{$$codetitles[0]});
+            } else {
+                $items[0] = $$idlist{$$codetitles[0]};
+            }
+            if (defined($$idlist_titles{$$codetitles[0]})) {
+                if ($$idlist_titles{$$codetitles[0]} =~ /","/) {
+                    @longitems = split(/","/,$$idlist_titles{$$codetitles[0]});
+                } else {
+                    $longitems[0] = $$idlist_titles{$$codetitles[0]};
+                }
+                for (my $i=0; $i<@longitems; $i++) {
+                    if ($longitems[$i] eq '') {
+                        $longitems[$i] = $items[$i];
+                    }
+                }
+            } else {
+                @longitems = @items;
+            }
+            for (my $i=0; $i<@items; $i++) {
+                $output .= ' <option value="'.$items[$i].'">'.$longitems[$i].'</option>';
+            }
+            $output .= '</select></td>';
+            for (my $i=1; $i<$numtitles; $i++) {
+                $output .= '<td>'.$$codetitles[$i].'<br />'."\n".
+                          '<select name="'.$$codetitles[$i].
+                          '" onChange="courseSet('."'$$codetitles[$i]'".')">'."\n".
+                          '<option value="-1">&lt;-Pick '.$$codetitles[$i-1].'</option>'."\n".
+                          '</select>'."\n".
+                          '</td>';
+            }
+            $output .= '</tr></table><br />';
+        }
+    }
+    $output .= '<input type="radio" name="coursepick" value="specific" onclick="coursePick(this.form);opencrsbrowser('."'".$formname."'".','."'".'dccourse'."'".','."'".'dcdomain'."'".','."'".'coursedesc'."','','1'".')" />'.&mt('Pick specific course(s):').' '.$courseform.'&nbsp;&nbsp;<input type="text" value="0" size="4" name="coursetotal" /><input type="hidden" name="courselist" value="" />selected.<br />'."\n";
+    $output .= &row_closure();
+    return $output;
+}
+
+sub status_select_row {
+    my ($types,$title,$css_class) = @_;
+    my $output; 
+    if (defined($title)) {
+        $output = &row_title($title,$css_class,'LC_pick_box_select');
+    }
+    $output .= qq|
+                                    <select name="types" multiple>\n|;
+    foreach my $status_type (sort(keys(%{$types}))) {
+        $output .= '  <option value="'.$status_type.'">'.$$types{$status_type}.'</option>';
+    }
+    $output .= qq|                   </select>\n|; 
+    if (defined($title)) {
+        $output .= &row_closure();
+    }
+    return $output;
+}
+
+sub email_default_row {
+    my ($authtypes,$title,$descrip,$css_class) = @_;
+    my $output = &row_title($title,$css_class);
+    my @rowcols = ('#eeeeee','#dddddd');
+    $output .= $descrip.
+	&Apache::loncommon::start_data_table().
+	&Apache::loncommon::start_data_table_header_row().
+	'<th>'.&mt('Authentication Method').'</th>'.
+	'<th align="right">'.&mt('Username -> e-mail conversion').'</th>'."\n".
+	&Apache::loncommon::end_data_table_header_row();
+    my $rownum = 0;
+    foreach my $auth (sort(keys(%{$authtypes}))) {
+        my ($userentry,$size);
+        if ($auth =~ /^krb/) {
+            $userentry = '';
+            $size = 25;
+        } else {
+            $userentry = 'username@';
+            $size = 15;
+        }
+        $output .= &Apache::loncommon::start_data_table_row().
+	    '<td>  '.$$authtypes{$auth}.'</td>'.
+	    '<td align="right">'.$userentry.
+	    '<input type="text" name="'.$auth.'" size="'.$size.'" /></td>'.
+	    &Apache::loncommon::end_data_table_row();
+    }
+    $output .= &Apache::loncommon::end_data_table();
+    $output .= &row_closure();
+    return $output;
+}
+
+
+sub submit_row {
+    my ($title,$cmd,$submit_text,$css_class) = @_;
+    my $output = &row_title($title,$css_class,'LC_pick_box_submit');
+    $output .= qq|
+             <br />
+             <input type="hidden" name="command" value="$cmd" />
+             <input type="submit" value="$submit_text"/> &nbsp;
+             <br /><br />
+            \n|;
+    return $output;
+}
+
+##############################################
+##############################################
+                                                                             
+# echo_form_input
+#
+# Generates html markup to add form elements from the referrer page
+# as hidden form elements (values encoded) in the new page.
+#
+# Intended to support two types of use 
+# (a) to allow backing up to earlier pages in a multi-page 
+# form submission process using a breadcrumb trail.
+#
+# (b) to allow the current page to be reloaded with form elements
+# set on previous page to remain unchanged.  An example would
+# be where the a page containing a dynamically-built table of data is 
+# is to be redisplayed, with only the sort order of the data changed. 
+#  
+# Inputs:
+# 1. Reference to array of form elements in the submitted form on 
+# the referrer page which are to be excluded from the echoed elements.
+#
+# 2. Reference to array of regular expressions, which if matched in the  
+# name of the form element n the referrer page will be omitted from echo. 
+#
+# Outputs: A scalar containing the html markup for the echoed form
+# elements (all as hidden elements, with values encoded). 
+
+
+sub echo_form_input {
+    my ($excluded,$regexps) = @_;
+    my $output = '';
+    foreach my $key (keys(%env)) {
+        if ($key =~ /^form\.(.+)$/) {
+            my $name = $1;
+            my $match = 0;
+            if ((!@{$excluded}) || (!grep/^$name$/,@{$excluded})) {
+                if (defined($regexps)) {
+                    if (@{$regexps} > 0) {
+                        foreach my $regexp (@{$regexps}) {
+                            if ($name =~ /\Q$regexp\E/) {
+                                $match = 1;
+                                last;
+                            }
+                        }
+                    }
+                }
+                if (!$match) {
+                    if (ref($env{$key})) {
+                        foreach my $value (@{$env{$key}}) {
+                            $value = &HTML::Entities::encode($value,'<>&"');
+                            $output .= '<input type="hidden" name="'.$name.
+                                             '" value="'.$value.'" />'."\n";
+                        }
+                    } else {
+                        my $value = &HTML::Entities::encode($env{$key},'<>&"');
+                        $output .= '<input type="hidden" name="'.$name.
+                                             '" value="'.$value.'" />'."\n";
+                    }
+                }
+            }
+        }
+    }
+    return $output;
 }
 
+##############################################
+##############################################
+                                                                             
+# set_form_elements
+#
+# Generates javascript to set form elements to values based on
+# corresponding values for the same form elements when the page was
+# previously submitted.
+#     
+# Last submission values are read from hidden form elements in referring 
+# page which have the same name, i.e., generated by &echo_form_input(). 
+#
+# Intended to be called by onload event.
+#
+# Inputs:
+# (a) Reference to hash of echoed form elements to be set.
+#
+# In the hash, keys are the form element names, and the values are the
+# element type (selectbox, radio, checkbox or text -for textbox, textarea or
+# hidden).
+#
+# (b) Optional reference to hash of stored elements to be set.
+#
+# If the page being displayed is a page which permits modification of
+# previously stored data, e.g., the first page in a multi-page submission,
+# then if stored is supplied, form elements will be set to the last stored
+# values.  If user supplied values are also available for the same elements
+# these will replace the stored values. 
+#        
+# Output:
+#  
+# javascript function - set_form_elements() which sets form elements,
+# expects an argument: formname - the name of the form according to 
+# the DOM, e.g., document.compose
+
+sub set_form_elements {
+    my ($elements,$stored) = @_;
+    my %values;
+    my $output .= 'function setFormElements(courseForm) {
+';
+    if (defined($stored)) {
+        foreach my $name (keys(%{$stored})) {
+            if (exists($$elements{$name})) {
+                if (ref($$stored{$name}) eq 'ARRAY') {
+                    $values{$name} = $$stored{$name};
+                } else {
+                    @{$values{$name}} = ($$stored{$name});
+                }
+            }
+        }
+    }
+
+    foreach my $key (keys(%env)) {
+        if ($key =~ /^form\.(.+)$/) {
+            my $name = $1;
+            if (exists($$elements{$name})) {
+                @{$values{$name}} = &Apache::loncommon::get_env_multiple($key);
+            }
+        }
+    }
+
+    foreach my $name (keys(%values)) {
+        for (my $i=0; $i<@{$values{$name}}; $i++) {
+            $values{$name}[$i] = &HTML::Entities::decode($values{$name}[$i],'<>&"');
+            $values{$name}[$i] =~ s/([\r\n\f]+)/\\n/g;
+            $values{$name}[$i] =~ s/"/\\"/g;
+        }
+        if ($$elements{$name} eq 'text') {
+            my $numvalues = @{$values{$name}};
+            if ($numvalues > 1) {
+                my $valuestring = join('","',@{$values{$name}});
+                $output .= qq|
+  var textvalues = new Array ("$valuestring");
+  var total = courseForm.$name.length;
+  if (total > $numvalues) {
+      total = $numvalues;
+  }    
+  for (var i=0; i<total; i++) {
+      courseForm.$name\[i].value = textvalues[i];
+  }
+|;
+            } else {
+                $output .= qq|
+  courseForm.$name.value = "$values{$name}[0]";
+|;
+            }
+        } else {
+            $output .=  qq|
+  var elementLength = courseForm.$name.length;
+  if (elementLength==undefined) {
+|;
+            foreach my $value (@{$values{$name}}) {
+                if ($$elements{$name} eq 'selectbox') {
+                    $output .=  qq|
+      if (courseForm.$name.options[0].value == "$value") {
+          courseForm.$name.options[0].selected = true;
+      }|;
+                } elsif (($$elements{$name} eq 'radio') ||
+                         ($$elements{$name} eq 'checkbox')) {
+                    $output .= qq|
+      if (courseForm.$name.value == "$value") {
+          courseForm.$name.checked = true;
+      }|;
+                }
+            }
+            $output .= qq|
+  }
+  else {
+      for (var i=0; i<courseForm.$name.length; i++) {
+|;
+            if ($$elements{$name} eq 'selectbox') {
+                $output .=  qq|
+          courseForm.$name.options[i].selected = false;|;
+            } elsif (($$elements{$name} eq 'radio') || 
+                     ($$elements{$name} eq 'checkbox')) {
+                $output .= qq|
+          courseForm.$name\[i].checked = false;|; 
+            }
+            $output .= qq|
+      }
+      for (var j=0; j<courseForm.$name.length; j++) {
+|;
+            foreach my $value (@{$values{$name}}) {
+                if ($$elements{$name} eq 'selectbox') {
+                    $output .=  qq|
+          if (courseForm.$name.options[j].value == "$value") {
+              courseForm.$name.options[j].selected = true;
+          }|;
+                } elsif (($$elements{$name} eq 'radio') ||
+                         ($$elements{$name} eq 'checkbox')) { 
+                      $output .= qq|
+          if (courseForm.$name\[j].value == "$value") {
+              courseForm.$name\[j].checked = true;
+          }|;
+                }
+            }
+            $output .= qq|
+      }
+  }
+|;
+        }
+    }
+    $output .= "
+}\n";
+    return $output;
+}
 
 1;
 
<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator at 
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 and the actions you performed just before this error.</p>
<p>More information about this error may be available
in the server error log.</p>
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