--- loncom/interface/lonhtmlcommon.pm	2002/07/22 21:21:32	1.2
+++ loncom/interface/lonhtmlcommon.pm	2010/12/02 13:47:17	1.253.2.7
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # a pile of common html routines
 #
-# $Id: lonhtmlcommon.pm,v 1.2 2002/07/22 21:21:32 www Exp $
+# $Id: lonhtmlcommon.pm,v 1.253.2.7 2010/12/02 13:47:17 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -25,250 +25,2544 @@
 #
 # http://www.lon-capa.org/
 #
+######################################################################
+######################################################################
+
+=pod
+
+=head1 NAME
+
+Apache::lonhtmlcommon - routines to do common html things
+
+=head1 SYNOPSIS
+
+Referenced by other mod_perl Apache modules.
+
+=head1 INTRODUCTION
+
+lonhtmlcommon is a collection of subroutines used to present information
+in a consistent html format, or provide other functionality related to
+html.
+
+=head2 General Subroutines
+
+=over 4
+
+=cut 
+
+######################################################################
+######################################################################
 
 package Apache::lonhtmlcommon;
 
 use strict;
+use Time::Local;
+use Time::HiRes;
+use Apache::lonlocal;
+use Apache::lonnet;
+use LONCAPA;
 
-sub MapOptions {
-    my ($data, $page)=@_;
-    my $Str = '';
-    $Str .= '<select name="';
-    $Str .= (($page)?$page:'').'Map">'."\n";
 
-    my $selected = 0;
-    foreach my $sequence (split(':',$data->{'orderedSequences'})) {
-	$Str .= '<option';
-        if($data->{$page.'Map'} eq $data->{$sequence.':title'}) {
-            $Str .= ' selected';
-            $selected = 1;
-        }
-	$Str .= '>'.$data->{$sequence.':title'}.'</option>'."\n";	     
-    }
-    $Str .= '<option';
-    if(!$selected) {
-        $Str .= ' selected';
+sub coursepreflink {
+   my ($text,$category)=@_;
+   if (&Apache::lonnet::allowed('opa',$env{'request.course.id'})) {
+      return '<a href="/adm/courseprefs?phase=display&actions='.$category.'">'.$text.'</a>';
+   } else {
+      return '';
+   }
+}
+
+sub raw_href_to_link {
+   my ($message)=@_;
+   $message=~s/(https?\:\/\/[^\s\'\"]+)(\s|$)/<a href="$1"><tt>$1<\/tt><\/a>$2/gi;
+   return $message;
+}
+
+##############################################
+##############################################
+
+=pod
+
+=item confirm_success
+
+Successful completion of an operation message
+
+=cut
+
+sub confirm_success {
+   my ($message,$failure)=@_;
+   if ($failure) {
+      return '<span class="LC_error">'."\n"
+            .'<img src="/adm/lonIcons/navmap.wrong.gif" alt="'.&mt('Error').'" /> '."\n"
+            .$message."\n"
+            .'</span>'."\n";
+   } else {
+      return '<span class="LC_success">'."\n"
+            .'<img src="/adm/lonIcons/navmap.correct.gif" alt="'.&mt('OK').'" /> '."\n"
+            .$message."\n"
+            .'</span>'."\n";
+   }
+}
+
+##############################################
+##############################################
+
+=pod
+
+=item dragmath_button
+
+Creates a button that launches a dragmath popup-window, in which an 
+expression can be edited and pasted as LaTeX into a specified textarea. 
+
+  textarea - Name of the textarea to edit.
+  helpicon - If true, show a help icon to the right of the button.
+
+=cut
+
+sub dragmath_button {
+    my ($textarea,$helpicon) = @_;
+    my $help_text; 
+    if ($helpicon) {
+        $help_text = &Apache::loncommon::help_open_topic('Authoring_Math_Editor');
     }
-    $Str .= '>All Maps</option>'."\n";
+    my $buttontext=&mt('Edit Math');
+    return <<ENDDRAGMATH;
+                <input type="button" value="$buttontext" onclick="javascript:mathedit('$textarea',document)" />$help_text
+ENDDRAGMATH
+}
 
-    $Str .= '</select>'."\n";
+##############################################
+
+=pod
 
+=item dragmath_js
+
+Javascript used to open pop-up window containing dragmath applet which 
+can be used to paste LaTeX into a textarea.
+ 
+=cut
+
+sub dragmath_js {
+    my ($popup) = @_;
+    return <<ENDDRAGMATHJS;
+                <script type="text/javascript">
+                // <![CDATA[
+                  function mathedit(textarea, doc) {
+                     targetEntry = textarea;
+                     targetDoc   = doc;
+                     newwin  = window.open("/adm/dragmath/applet/$popup.html","","width=565,height=500,resizable");
+                  }
+                // ]]>
+                </script>
+
+ENDDRAGMATHJS
+}
+
+
+##############################################
+##############################################
+
+=pod
+
+=item authorbombs
+
+=cut
+
+##############################################
+##############################################
+
+sub authorbombs {
+    my $url=shift;
+    $url=&Apache::lonnet::declutter($url);
+    my ($udom,$uname)=($url=~m{^($LONCAPA::domain_re)/($LONCAPA::username_re)/});
+    my %bombs=&Apache::lonmsg::all_url_author_res_msg($uname,$udom);
+    foreach my $bomb (keys(%bombs)) {
+	if ($bomb =~ /^$udom\/$uname\//) {
+	    return '<a href="/adm/bombs/'.$url.
+		'"><img src="'.&Apache::loncommon::lonhttpdurl('/adm/lonMisc/bomb.gif').'" alt="'.&mt('Bomb').'" border="0" /></a>'.
+		&Apache::loncommon::help_open_topic('About_Bombs');
+	}
+    }
+    return '';
+}
+
+##############################################
+##############################################
+
+sub recent_filename {
+    my $area=shift;
+    return 'nohist_recent_'.&escape($area);
+}
+
+sub store_recent {
+    my ($area,$name,$value,$freeze)=@_;
+    my $file=&recent_filename($area);
+    my %recent=&Apache::lonnet::dump($file);
+    if (scalar(keys(%recent))>20) {
+# remove oldest value
+	my $oldest=time();
+	my $delkey='';
+	foreach my $item (keys(%recent)) {
+	    my $thistime=(split(/\&/,$recent{$item}))[0];
+	    if (($thistime ne "always_include") && ($thistime<$oldest)) {
+		$oldest=$thistime;
+		$delkey=$item;
+	    }
+	}
+	&Apache::lonnet::del($file,[$delkey]);
+    }
+# store new value
+    my $timestamp;
+    if ($freeze) {
+        $timestamp = "always_include";
+    } else {
+        $timestamp = time();
+    }   
+    &Apache::lonnet::put($file,{ $name => 
+				 $timestamp.'&'.&escape($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'":'').
+	">\n<option value=''>--- ".&mt('Recent')." ---</option>";
+    foreach my $value (sort(keys(%recent))) {
+	unless ($value =~/^error\:/) {
+	    my $escaped = &Apache::loncommon::escape_url($value);
+	    &Apache::loncommon::inhibit_menu_check(\$escaped);
+            if ($area eq 'residx') {
+                next if ((!&Apache::lonnet::allowed('bre',$value)) && (!&Apache::lonnet::allowed('bro',$value)));
+            }
+	    $return.="\n<option value='$escaped'>".
+		&unescape((split(/\&/,$recent{$value}))[1]).
+		'</option>';
+	}
+    }
+    $return.="\n</select>\n";
+    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($thisvalue);
+        }
+    }
+    return %return_hash;
+}
+
+
+
+=pod
+
+=item textbox
+
+=cut
+
+##############################################
+##############################################
+sub textbox {
+    my ($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;
 }
 
-sub StudentOptions {
-    my ($cache, $students, $selectedName, $page)=@_;
+##############################################
+##############################################
 
-    my $Str = '';
-    $Str = '<select name="'.(($page)?$page:'').'Student">'."\n";
+=pod
+
+=item checkbox
+
+=cut
+
+##############################################
+##############################################
+sub checkbox {
+    my ($name,$checked,$value) = @_;
+    my $Str = '<input type="checkbox" name="'.$name.'" ';
+    if (defined($value)) {
+        $Str .= 'value="'.$value.'"';
+    } 
+    if ($checked) {
+        $Str .= ' checked="checked"';
+    }
+    $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="checked"';
+    }
+    $Str .= ' />';
+    return $Str;
+}
+
+##############################################
+##############################################
+
+=pod
+
+=item &date_setter
+
+&date_setter returns html and javascript for a compact date-setting form.
+To retrieve values from it, use &get_date_from_form().
+
+Inputs
+
+=over 4
+
+=item $dname 
+
+The name to prepend to the form elements.  
+The form elements defined will be dname_year, dname_month, dname_day,
+dname_hour, dname_min, and dname_sec.
+
+=item $currentvalue
 
-    my $selected=0;
-    $Str .= '<option';
-    if($selectedName eq 'All Students') {
-        $Str .= ' selected';
-        $selected = 1;
+The current setting for this time parameter.  A unix format time
+(time in seconds since the beginning of Jan 1st, 1970, GMT.  
+An undefined value is taken to indicate the value is the current time.
+Also, to be explicit, a value of 'now' also indicates the current time.
+
+=item $special
+
+Additional html/javascript to be associated with each element in
+the date_setter.  See lonparmset for example usage.
+
+=item $includeempty 
+
+=item $state
+
+Specifies the initial state of the form elements.  Either 'disabled' or empty.
+Defaults to empty, which indiciates the form elements are not disabled. 
+
+=back
+
+Bugs
+
+The method used to restrict user input will fail in the year 2400.
+
+=cut
+
+##############################################
+##############################################
+sub date_setter {
+    my ($formname,$dname,$currentvalue,$special,$includeempty,$state,
+        $no_hh_mm_ss,$defhour,$defmin,$defsec,$nolink,$hide_timezone) = @_;
+    my $now = time;
+    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 = $now;
+    }
+    if ((!defined($currentvalue)) || ($currentvalue eq '')) {
+	$wasdefined=0;
+	if ($includeempty) {
+	    $currentvalue = 0;
+	} else {
+	    $currentvalue = $now;
+	}
+    }
+    # other potentially useful values:     wkday,yrday,is_daylight_savings
+    my $tzname;
+    my ($sec,$min,$hour,$mday,$month,$year)=('','',undef,'','','');
+    if ($currentvalue) {
+        ($tzname,$sec,$min,$hour,$mday,$month,$year) = &get_timedates($currentvalue); 
+    }
+    unless ($wasdefined) {
+        ($tzname,$sec,$min,$hour,$mday,$month,$year) = &get_timedates($now);
+	if (($defhour) || ($defmin) || ($defsec)) {
+	    $sec=($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 type="text/javascript">
+// <![CDATA[
+    function $dname\_checkday() {
+        var day   = document.$formname.$dname\_day.value;
+        var month = document.$formname.$dname\_month.value;
+        var year  = document.$formname.$dname\_year.value;
+        var valid = true;
+        if (day < 1) {
+            document.$formname.$dname\_day.value = 1;
+        } 
+        if (day > 31) {
+            document.$formname.$dname\_day.value = 31;
+        }
+        if ((month == 1)  || (month == 3)  || (month == 5)  ||
+            (month == 7)  || (month == 8)  || (month == 10) ||
+            (month == 12)) {
+            if (day > 31) {
+                document.$formname.$dname\_day.value = 31;
+                day = 31;
+            }
+        } else if (month == 2 ) {
+            if ((year % 4 == 0) && (year % 100 != 0)) {
+                if (day > 29) {
+                    document.$formname.$dname\_day.value = 29;
+                }
+            } else if (day > 29) {
+                document.$formname.$dname\_day.value = 28;
+            }
+        } else if (day > 30) {
+            document.$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;
     }
-    $Str .= '>All Students</option>'."\n";
 
-    foreach (@$students) {
-	$Str .= '<option';
-	if($selectedName eq $_) {
-            $Str .= ' selected';
-            $selected = 1;
+    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 $dname\_opencalendar() {
+        if (! document.$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 .= '  <span class="LC_nobreak">';
+    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) { $monthselector.="<option value=''></option>"; }
+    for(my $m = 1;$m <=$#Months;$m++) {
+        $monthselector .= qq{      <option value="$m"};
+        $monthselector .= ' selected="selected"' if ($m-1 eq $month);
+        $monthselector .= '> '.&mt($Months[$m]).' </option>'."\n";
+    }
+    $monthselector.= '  </select>';
+    # Day
+    my $dayselector = qq{<input type="text" name="$dname\_day" $state value="$mday" size="3" $special onchange="javascript:$dname\_checkday()" />};
+    # Year
+    my $yearselector = qq{<input type="text" name="$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++) {
+        $hourselector .= qq{<option value="$h"};
+        $hourselector .= ' selected="selected"' if (defined($hour) && $hour == $h);
+        $hourselector .= ">";
+        my $timest='';
+        if ($h == 0) {
+            $timest .= "12 am";
+        } elsif($h == 12) {
+            $timest .= "12 noon";
+        } elsif($h < 12) {
+            $timest .= "$h am";
+        } else {
+            $timest .= $h-12 ." pm";
         }
-        $Str .= '>';
-        $Str .= $cache->{$_.':fullname'};
-        $Str .= '</option>'."\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()">};
     }
+    #
+    my $tzone;
+    unless ($hide_timezone) {
+        $tzone = ' '.$tzname.' ';
+    }
+    if ($no_hh_mm_ss) {
+        $result .= &mt('[_1] [_2] [_3] ',
+                       $monthselector,$dayselector,$yearselector).
+                   $tzone;
+        if (!$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).
+                   $tzone;
+        if (!$nolink) {
+            $result .= &mt('[_1]Select Date[_2]',$cal_link,'</a>');
+        }
+    }
+    $result .= "</span>\n<!-- end $dname date setting form -->\n";
+    return $result;
+}
 
-    $Str .= '<option';
-    if(!$selected) {
-        $Str .= ' selected';
+sub get_timedates {
+    my ($epoch) = @_;
+    my $dt = DateTime->from_epoch(epoch => $epoch)
+                     ->set_time_zone(&Apache::lonlocal::gettimezone());
+    my $tzname = $dt->time_zone_short_name();
+    my $sec = $dt->second;
+    my $min = $dt->minute;
+    my $hour = $dt->hour;
+    my $mday = $dt->day;
+    my $month = $dt->month;
+    if ($month) {
+        $month --;
     }
-    $Str .= '>No Student Selected</option>'."\n";
+    my $year = $dt->year;
+    return ($tzname,$sec,$min,$hour,$mday,$month,$year);
+}
 
-    $Str .= '</select>'."\n";
+sub build_url {
+    my ($base, $fields)=@_;
+    my $url;
+    $url = $base.'?';
+    foreach my $key (keys(%$fields)) {
+        $url.=&escape($key).'='.&escape($$fields{$key}).'&amp;';
+    }
+    $url =~ s/&amp;$//;
+    return $url;
+}
 
+
+##############################################
+##############################################
+
+=pod
+
+=item &get_date_from_form
+
+get_date_from_form retrieves the date specified in an &date_setter form.
+
+Inputs:
+
+=over 4
+
+=item $dname
+
+The name passed to &date_setter, which prefixes the form elements.
+
+=item $defaulttime
+
+The unix time to use as the default in case of poor inputs.
+
+=back
+
+Returns: Unix time represented in the form.
+
+=cut
+
+##############################################
+##############################################
+sub get_date_from_form {
+    my ($dname,$timezone) = @_;
+    my ($sec,$min,$hour,$day,$month,$year);
+    #
+    if (defined($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 (($tmpmin =~ /^\d+$/) && ($tmpmin >= 0) && ($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 (($tmphour =~ /^\d+$/) && ($tmphour >= 0) && ($tmphour < 24)) {
+            $hour = $tmphour;
+        }
+    } else {
+        $hour = 0;
+    }
+    if (defined($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 (($tmpmonth =~ /^\d+$/) && ($tmpmonth > 0) && ($tmpmonth < 13)) {
+            $month = $tmpmonth;
+        }
+    }
+    if (defined($env{'form.'.$dname.'_year'})) {
+        my $tmpyear = $env{'form.'.$dname.'_year'};
+        if (($tmpyear =~ /^\d+$/) && ($tmpyear >= 1970)) {
+            $year = $tmpyear;
+        }
+    }
+    if (($year<1970) || ($year>2037)) { return undef; }
+    if (defined($sec) && defined($min)   && defined($hour) &&
+        defined($day) && defined($month) && defined($year)) {
+        if (defined($timezone)) {
+            if (&Apache::lonlocal::gettimezone($timezone) eq 'local') {
+                $timezone = &Apache::lonlocal::gettimezone();
+            }
+        } else {
+            $timezone = &Apache::lonlocal::gettimezone();
+        }
+        my $dt = DateTime->new( year   => $year,
+                                month  => $month,
+                                day    => $day,
+                                hour   => $hour,
+                                minute => $min,
+                                second => $sec,
+                                time_zone => $timezone,
+                              );
+        my $epoch_time  = $dt->epoch;
+        if ($epoch_time ne '') {
+            return $epoch_time;
+        } else {
+            return undef;
+        }
+    } else {
+        return undef;
+    }
+}
+
+##############################################
+##############################################
+
+=pod
+
+=item &pjump_javascript_definition()
+
+Returns javascript defining the 'pjump' function, which opens up a
+parameter setting wizard.
+
+=cut
+
+##############################################
+##############################################
+sub pjump_javascript_definition {
+    my $Str = <<END;
+    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)
+                 +"&defhour="+escape(hour)+"&defmin="+escape(min)
+                 +"&defsec="+escape(sec),"LONCAPAparms",
+                 "height=350,width=350,scrollbars=no,menubar=no");
+    }
+END
     return $Str;
 }
 
-sub StatusOptions {
-    my ($status, $formName)=@_;
+##############################################
+##############################################
+
+=pod
+
+=item &javascript_nothing()
+
+Return an appropriate null for the users browser.  This is used
+as the first arguement for window.open calls when you want a blank
+window that you can then write to.
+
+=cut
+
+##############################################
+##############################################
+sub javascript_nothing {
+    # mozilla and other browsers work with "''", but IE on mac does not.
+    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 'explorer' && $user_os =~ 'mac') {
+        $nothing = "'javascript:void(0);'";
+    }
+    return $nothing;
+}
+
+##############################################
+##############################################
+sub javascript_docopen {
+    my ($mimetype) = @_;
+    $mimetype ||= 'text/html';
+    # 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 {
+	$nothing = "document.open('$mimetype','replace')";
+    }
+    return $nothing;
+}
 
-    my $OpSel1 = '';
-    my $OpSel2 = '';
-    my $OpSel3 = '';
-
-    if($status eq 'Any')         { $OpSel3 = ' selected'; }
-    elsif($status eq 'Expired' ) { $OpSel2 = ' selected'; }
-    else                         { $OpSel1 = ' selected'; }
+
+##############################################
+##############################################
+
+=pod
+
+=item &StatusOptions()
+
+Returns html for a selection box which allows the user to choose the
+enrollment status of students.  The selection box name is 'Status'.
+
+Inputs:
+
+$status: the currently selected status.  If undefined the value of
+$env{'form.Status'} is taken.  If that is undefined, a value of 'Active'
+is used.
+
+$formname: The name of the form.  If defined the onchange attribute of
+the selection box is set to document.$formname.submit().
+
+$size: the size (number of lines) of the selection box.
+
+$onchange: javascript to use when the value is changed.  Enclosed in 
+double quotes, ""s, not single quotes.
+
+Returns: a perl string as described.
+
+=cut
+
+##############################################
+##############################################
+sub StatusOptions {
+    my ($status, $formName,$size,$onchange,$mult)=@_;
+    $size = 1 if (!defined($size));
+    if (! defined($status)) {
+        $status = 'Active';
+        $status = $env{'form.Status'} if (exists($env{'form.Status'}));
+    }
 
     my $Str = '';
     $Str .= '<select name="Status"';
-    if(defined($formName) && $formName ne '') {
+    if (defined($mult)){
+        $Str .= ' multiple="multiple" ';
+    }
+    if(defined($formName) && $formName ne '' && ! defined($onchange)) {
         $Str .= ' onchange="document.'.$formName.'.submit()"';
     }
+    if (defined($onchange)) {
+        $Str .= ' onchange="'.$onchange.'"';
+    }
+    $Str .= ' size="'.$size.'" ';
     $Str .= '>'."\n";
-    $Str .= '<option'.$OpSel1.'>Active</option>'."\n";
-    $Str .= '<option'.$OpSel2.'>Expired</option>'."\n";
-    $Str .= '<option'.$OpSel3.'>Any</option>'."\n";
+    foreach my $type (['Active',  &mt('Currently Has Access')],
+		      ['Future',  &mt('Will Have Future Access')],
+		      ['Expired', &mt('Previously Had Access')],
+		      ['Any',     &mt('Any Access Status')]) {
+	my ($name,$label) = @$type;
+	$Str .= '<option value="'.$name.'" ';
+	if ($status eq $name) {
+	    $Str .= 'selected="selected" ';
+	}
+	$Str .= '>'.$label.'</option>'."\n";
+    }
+
     $Str .= '</select>'."\n";
 }
 
-sub Title {
-    my ($pageName)=@_;
+########################################################
+########################################################
 
-    my $Str = '';
+=pod
 
-    $Str .= '<html><head><title>'.$pageName.'</title></head>'."\n";
-    $Str .= '<body bgcolor="#FFFFFF">'."\n";
-    $Str .= '<script>window.focus(); window.width=500;window.height=500;';
-    $Str .= '</script>'."\n";
-    $Str .= '<table width="100%"><tr><td valign="top">';
-    $Str .= '<h1> Course: ';
-    $Str .= $ENV{'course.'.$ENV{'request.course.id'}.'.description'};
-    $Str .= '</h1></td><td align="right">'."\n";
-    $Str .= '<img align="right" src=/adm/lonIcons/lonlogos.gif>';
-    $Str .= '</td></tr></table>'."\n";
-#    $Str .= '<h3>Current Time: '.localtime(time).'</h3><br><br><br>'."\n";
+=item Progess Window Handling Routines
 
-    return $Str;
-}
+These routines handle the creation, update, increment, and closure of 
+progress windows.  The progress window reports to the user the number
+of items completed and an estimate of the time required to complete the rest.
 
-sub CreateStatisticsMainMenu {
-    my ($status, $reports)=@_;
+=over 4
 
-    my $Str = '';
 
-    $Str .= '<table border="0"><tbody><tr>'."\n";
-    $Str .= '<td></td><td></td>'."\n";
-    $Str .= '<td align="center"><b>Analysis Reports:</b></td>'."\n";
-    $Str .= '<td align="center"><b>Student Status:</b></td></tr>'."\n";
-    $Str .= '<tr>'."\n";
-    $Str .= '<td align="center"><input type="submit" name="Refresh" ';
-    $Str .= 'value="Refresh" /></td>'."\n";
-    $Str .= '<td align="center"><input type="submit" name="DownloadAll" ';
-    $Str .= 'value="Update All Student Data" /></td>'."\n";
-    $Str .= '<td align="center">';
-    $Str .= '<select name="reportSelected" onchange="document.';
-    $Str .= 'Statistics.submit()">'."\n";
-
-    foreach (sort(keys(%$reports))) {
-        next if($_ eq 'reportSelected');
-        $Str .= '<option name="'.$_.'"';
-        if($reports->{'reportSelected'} eq $reports->{$_}) {
-            $Str .= ' selected=""';
-        }
-        $Str .= '>'.$reports->{$_}.'</option>'."\n";
-    }
-    $Str .= '</select></td>'."\n";
-
-    $Str .= '<td align="center">';
-    $Str .= &StatusOptions($status, 'Statistics');
-    $Str .= '</td>'."\n";
+=item &Create_PrgWin
 
-    $Str .= '</tr></tbody></table>'."\n";
-    $Str .= '<hr>'."\n";
+Writes javascript to the client to open a progress window and returns a
+data structure used for bookkeeping.
 
-    return $Str;
-}
+Inputs
 
-=pod
+=over 4
+
+=item $r Apache request
+
+=item $title The title of the progress window
+
+=item $heading A description (usually 1 line) of the process being initiated.
+
+=item $number_to_do The total number of items being processed.
+
+=item $type Either 'popup' or 'inline' (popup is assumed if nothing is
+       specified)
+
+=item $width Specify the width in charaters of the input field.
+
+=item $formname Only useful in the inline case, if a form already exists, this needs to be used and specfiy the name of the form, otherwise the Progress line will be created in a new form of it's own
+
+=item $inputname Only useful in the inline case, if a form and an input of type text exists, use this to specify the name of the input field 
 
-=item &CreateTableHeadings()
+=back
+
+Returns a hash containing the progress state data structure.
+
+
+=item &Update_PrgWin
+
+Updates the text in the progress indicator.  Does not increment the count.
+See &Increment_PrgWin.
 
-This function generates the column headings for the chart.
+Inputs:
 
 =over 4
 
-Inputs: $CacheData, $studentInformation, $headings, $spacePadding
+=item $r Apache request
+
+=item $prog_state Pointer to the data structure returned by &Create_PrgWin
+
+=item $displaystring The string to write to the status indicator
+
+=back
+
+Returns: none
+
+
+=item Increment_PrgWin
+
+Increment the count of items completed for the progress window by 1.  
+
+Inputs:
+
+=over 4
+
+=item $r Apache request
+
+=item $prog_state Pointer to the data structure returned by Create_PrgWin
+
+=item $extraInfo A description of the items being iterated over.  Typically
+'student'.
 
-$CacheData: pointer to a hash tied to the cached data database
+=back
+
+Returns: none
+
+
+=item Close_PrgWin
+
+Closes the progress window.
 
-$studentInformation: a pointer to an array containing the names of the data 
-held in a column and is used as part of a key into $CacheData
+Inputs:
 
-$headings: The names of the headings for the student information
+=over 4 
 
-$spacePadding: The spaces to go between columns
+=item $r Apache request
 
-Output: $Str
+=item $prog_state Pointer to the data structure returned by Create_PrgWin
 
-$Str: A formatted string of the table column headings.
+=back
+
+Returns: none
 
 =back
 
 =cut
 
-sub CreateStudentInformationHeadings {
-    my ($data,$studentInformation,$headings,$displayString)=@_;
-    my $Str='';
+########################################################
+########################################################
 
-    for(my $index=0; $index<(scalar @$headings); $index++) {
-#        if(!&ShouldShowColumn($data, 'ChartHeading'.$index)) {
-#            next;
-#        }
- 	my $data=$headings->[$index];
-        my $linkdata=$studentInformation->[$index];
-        my $tempString = $displayString;
-        $tempString =~ s/LINKDATA/$linkdata/;
-        $tempString =~ s/DISPLAYDATA/$data/;
-        $Str .= $tempString;
+my $uniq=0;
+sub get_uniq_name {
+    $uniq++;
+    return 'uniquename'.$uniq;
+}
+
+# Create progress
+sub Create_PrgWin {
+    my ($r, $title, $heading, $number_to_do,$type,$width,$formname,
+	$inputname)=@_;
+    if (!defined($type)) { $type='popup'; }
+    if (!defined($width)) { $width=55; }
+    my %prog_state;
+    $prog_state{'type'}=$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,&Apache::lonhtmlcommon::scripttag(
+        "var popwin;
+         function openpopwin () {
+         popwin=open(\'\',\'popwin\',\'width=400,height=100\');".
+        "popwin.document.writeln(\'".$start_page.
+              "<h4>".&mt("$heading")."<\/h4>".
+              "<form action=\"\" name=\"popremain\" method=\"post\">".
+              '<input type="text" size="'.$width.'" name="remaining" value="'.
+	      &mt('Starting').'" /><\\/form>'.$end_page.
+              "\');".
+        "popwin.document.close();}".
+        "\nwindow.setTimeout(openpopwin,0)"
+    ));
+	$prog_state{'formname'}='popremain';
+	$prog_state{'inputname'}="remaining";
+    } elsif ($type eq 'inline') {
+	$prog_state{'window'}='window';
+	if (!$formname) {
+	    $prog_state{'formname'}=&get_uniq_name();
+	    &r_print($r,'<form action="" name="'.$prog_state{'formname'}.'">');
+	} else {
+	    $prog_state{'formname'}=$formname;
+	}
+	if (!$inputname) {
+	    $prog_state{'inputname'}=&get_uniq_name();
+	    &r_print($r,&mt("$heading [_1]",' <input type="text" name="'.$prog_state{'inputname'}.'" size="'.$width.'" />'));
+	} else {
+	    $prog_state{'inputname'}=$inputname;
+	    
+	}
+	if (!$formname) { &r_print($r,'</form>'); }
+	&Update_PrgWin($r,\%prog_state,&mt('Starting'));
     }
 
-    return $Str;
+    $prog_state{'done'}=0;
+    $prog_state{'firststart'}=&Time::HiRes::time();
+    $prog_state{'laststart'}=&Time::HiRes::time();
+    $prog_state{'max'}=$number_to_do;
+    
+    return %prog_state;
+}
+
+# update progress
+sub Update_PrgWin {
+    my ($r,$prog_state,$displayString)=@_;
+    &r_print($r,&Apache::lonhtmlcommon::scripttag(
+        $$prog_state{'window'}.'.document.'.
+        $$prog_state{'formname'}.'.'.
+        $$prog_state{'inputname'}.'.value="'.
+        $displayString.'";'
+    ));
+    $$prog_state{'laststart'}=&Time::HiRes::time();
+}
+
+# increment progress state
+sub Increment_PrgWin {
+    my ($r,$prog_state,$extraInfo)=@_;
+    $$prog_state{'done'}++;
+    my $time_est= (&Time::HiRes::time() - $$prog_state{'firststart'})/
+        $$prog_state{'done'} *
+	($$prog_state{'max'}-$$prog_state{'done'});
+    $time_est = int($time_est);
+    #
+    my $min = int($time_est/60);
+    my $sec = $time_est % 60;
+    # 
+    my $str;
+    if ($min == 0 && $sec > 1) {
+        $str = '[_2] seconds';
+    } elsif ($min == 1 && $sec > 1) {
+        $str = '1 minute [_2] seconds';
+    } elsif ($min == 1 && $sec < 2) {
+        $str = '1 minute';
+    } elsif ($min < 10 && $sec > 1) {
+        $str = '[_1] minutes, [_2] seconds';
+    } elsif ($min >= 10 || $sec < 2) {
+        $str = '[_1] minutes';
+    }
+    $time_est = &mt($str,$min,$sec);
+    #
+    my $lasttime = &Time::HiRes::time()-$$prog_state{'laststart'};
+    if ($lasttime > 9) {
+        $lasttime = int($lasttime);
+    } elsif ($lasttime < 0.01) {
+        $lasttime = 0;
+    } else {
+        $lasttime = sprintf("%3.2f",$lasttime);
+    }
+    if ($lasttime == 1) {
+        $lasttime = '('.$lasttime.' '.&mt('second for').' '.$extraInfo.')';
+    } else {
+        $lasttime = '('.$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'}));
+    if (! defined($user_browser) || ! defined($user_os)) {
+        (undef,$user_browser,undef,undef,undef,$user_os) = 
+                           &Apache::loncommon::decode_user_agent();
+    }
+    if ($user_browser eq 'explorer' && $user_os =~ 'mac') {
+        $lasttime = '';
+    }
+    &r_print($r,&Apache::lonhtmlcommon::scripttag(
+        $$prog_state{'window'}.'.document.'.
+        $$prog_state{'formname'}.'.'.
+        $$prog_state{'inputname'}.'.value="'.
+        $$prog_state{'done'}.'/'.$$prog_state{'max'}.
+        ': '.$time_est.' '.&mt('remaining').' '.$lasttime.'";'
+    ));
+    $$prog_state{'laststart'}=&Time::HiRes::time();
+}
+
+# close Progress Line
+sub Close_PrgWin {
+    my ($r,$prog_state)=@_;
+    if ($$prog_state{'type'} eq 'popup') {
+        &r_print($r,&Apache::lonhtmlcommon::scripttag(
+            'popwin.close()'
+        ));
+    } elsif ($$prog_state{'type'} eq 'inline') {
+	&Update_PrgWin($r,$prog_state,&mt('Done'));
+    }
+    undef(%$prog_state);
+}
+
+sub r_print {
+    my ($r,$to_print)=@_;
+    if ($r) {
+	$r->print($to_print);
+	$r->rflush();
+    } else {
+	print($to_print);
+    }
+}
+
+# ------------------------------------------------------- Puts directory header
+
+sub crumbs {
+    my ($uri,$target,$prefix,$form,$skiplast)=@_;
+    if ($target) {
+        $target = ' target="'.
+                  &Apache::loncommon::escape_single($target).'"';
+    }
+    my $output='<span class="LC_filename">';
+    $output.=$prefix.'/';
+    if (($env{'user.adv'}) || ($env{'user.author'})) {
+        my $path=$prefix.'/';
+        foreach my $dir (split('/',$uri)) {
+            if (! $dir) { next; }
+            $path .= $dir;
+            if ($path eq $uri) {
+                if ($skiplast) {
+                    $output.=$dir;
+                    last;
+                } 
+            } else {
+                $path.='/'; 
+            }
+            my $href_path = &HTML::Entities::encode($path,'<>&"');
+            &Apache::loncommon::inhibit_menu_check(\$href_path);
+            if ($form) {
+                my $href = 'javascript:'.$form.".action='".$href_path."';".$form.'.submit();';
+                $output.=qq{<a href="$href"$target>$dir</a>/};
+            } else {
+                $output.=qq{<a href="$href_path"$target>$dir</a>/};
+            }
+        }
+    } else {
+        foreach my $dir (split('/',$uri)) {
+            if (! $dir) { next; }
+            $output.=$dir.'/';
+        }
+    }
+    if ($uri !~ m|/$|) { $output=~s|/$||; }
+    $output.='</span>';
+
+    return $output;
+}
+
+# --------------------- 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 $nothing=&javascript_nothing();
+    return (<<ENDCHECK);
+<script type="text/javascript"> 
+// <![CDATA[
+//<!-- BEGIN LON-CAPA Internal
+var checkwin;
+
+function spellcheckerwindow(string) {
+    var esc_string = string.replace(/\"/g,'&quot;');
+    checkwin=window.open($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);">$linktext</a>
+ENDLINK
+}
+
+# ------------------------------------------------- Output headers for HTMLArea
+
+{
+    my @htmlareafields;
+    sub init_htmlareafields {
+	undef(@htmlareafields);
+    }
+    
+    sub add_htmlareafields {
+	my (@newfields) = @_;
+	push(@htmlareafields,@newfields);
+    }
+
+    sub get_htmlareafields {
+	return @htmlareafields;
+    }
+}
+
+sub htmlareaheaders {
+    return if (&htmlareablocked());
+    return if (!&htmlareabrowser());
+    return (<<ENDHEADERS);
+<script type="text/javascript" src="/fckeditor/fckeditor.js"></script>
+ENDHEADERS
+}
+
+# ----------------------------------------------------------------- Preferences
+
+sub disablelink {
+    my @fields=@_;
+    if (defined($#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>';
+}
+
+# ------------------------------------------------- lang to use in html editor
+sub htmlarea_lang {
+    my $lang='en';
+    if (&mt('htmlarea_lang') ne 'htmlarea_lang') {
+	$lang=&mt('htmlarea_lang');
+    }
+    return $lang;
+}
+
+# ----------------------------------------- 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">'."\n"
+              .'// <![CDATA['."\n";
+    my $lang = &htmlarea_lang();
+    foreach my $field (@fields) {
+	$output.="
+{
+    var oFCKeditor = new FCKeditor('$field');
+    oFCKeditor.Config['CustomConfigurationsPath'] = 
+	'/fckeditor/loncapaconfig.js';    
+    oFCKeditor.ReplaceTextarea();
+    oFCKeditor.Config['AutoDetectLanguage'] = false;
+    oFCKeditor.Config['DefaultLanguage'] = '$lang';
+}";
+    }
+    $output.="\nwindow.status='Activated Editfields';\n"
+            .'// ]]>'."\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 &FormatStudentInformation()
+=item breadcrumbs
 
-This function produces a formatted string of the student's information:
-username, domain, section, full name, and PID.
+Compiles the previously registered breadcrumbs into an series of links.
+Additionally supports a 'component', which will be displayed on the
+right side of the breadcrumbs enclosing div (without a link).
+A link to help for the component will be included if one is specified.
 
-=over 4
+All inputs can be undef without problems.
 
-Input: $cache, $name, $studentInformation, $spacePadding
+Inputs: $component (the text on the right side of the breadcrumbs trail),
+        $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)
+        $no_mt (optional flag, 1 if &mt() is _not_ to be applied to $component
+           when including the text on the right.
+Returns a string containing breadcrumbs for the current page.
 
-$cache: This is a pointer to a hash that is tied to the cached data
+=item clear_breadcrumbs
 
-$name:  The name and domain of the current student in name:domain format
+Clears the previously stored breadcrumbs.
 
-$studentInformation: A pointer to an array holding the names used to
+=item add_breadcrumb
 
-remove data from the hash.  They represent the name of the data to be removed.
+Pushes a breadcrumb on the stack of crumbs.
 
-$spacePadding: Extra spaces that represent the space between columns
+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. If the key 'no_mt' is present the 'title' 
+and 'text' values won't be sent through &mt()
 
-Output: $Str
+returns: nothing    
 
-$Str: Formatted string.
+=cut
+
+############################################################
+############################################################
+{
+    my @Crumbs;
+    my %tools = ();
+    
+    sub breadcrumbs {
+        my ($component,$component_help,$menulink,$helplink,$css_class,$no_mt, $CourseBreadcrumbs) = @_;
+        #
+        $css_class ||= 'LC_breadcrumbs';
+
+        # Make the faq and bug data cascade
+        my $faq  = '';
+        my $bug  = '';
+        my $help = '';
+        # Crumb Symbol
+        my $crumbsymbol = '&raquo;';
+        # 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) {
+            if ($menulink eq '_nomenu') {
+                return unless($last);
+            } else {
+                my $description = 'Menu';
+                my $href = '/adm/menu';
+                my $tooltip = 'Go to main menu';
+                my $no_mt_descr = 0;
+                if ((exists($env{'request.course.id'})) &&
+                    ($env{'request.course.id'} ne '') && 
+                    !($env{'form.context'} eq 'requestcrs')) {
+                    if ((&Apache::loncommon::needs_gci_custom()) || ($env{'user.domain'} eq 'gcitest')) {
+                        if ($env{'environment.remotenavmap'} eq 'on') {
+                            # open link using javascript when remote navmap is activated
+                            $href = "javascript:gonav('/adm/navmaps');";
+                        } else {
+                            $href = '/adm/navmaps';
+                        }
+                        $tooltip = 'Contents';
+                    }
+                    if ($env{'course.'.$env{'request.course.id'}.'.description'} ne '') {
+                        $description =
+                            $env{'course.'.$env{'request.course.id'}.'.description'};
+                        $no_mt_descr = 1;
+                    }
+                }
+                $menulink =  {  href   => $href,
+                                title  => $tooltip,
+                                target => '_top',
+                                text   => $description,
+                                no_mt  => $no_mt_descr, };
+                if ($last) {
+                    #$last set, so we have some crumbs
+                    unshift(@Crumbs,$menulink);
+                } else {
+                    #only menulink crumb present
+                    $last = $menulink;
+                }
+            }
+        }
+        my $links = join "", 
+                 map {
+                     $faq  = $_->{'faq'}  if (exists($_->{'faq'}));
+                     $bug  = $_->{'bug'}  if (exists($_->{'bug'}));
+                     $help = $_->{'help'} if (exists($_->{'help'}));
+
+                     my $result = $_->{no_mt} ? $_->{text} : mt($_->{text});
+
+                     if ($_->{href}){
+                         $result = htmltag( 'a', $result, 
+                                           { 
+                                               href   => $_->{href},
+                                               title  => $_->{no_mt} ? 
+                                                $_->{title} : mt($_->{title}),
+                                               target => $_->{target},
+                                           });
+                     }
+
+                     $result = htmltag( 'li', "$result $crumbsymbol");
+                 } @Crumbs;
+
+        #should the last Element be translated?
+
+        my $lasttext = $last->{'no_mt'} ? $last->{'text'}
+                     : mt( $last->{'text'} );
+
+        # last breadcrumb is the first order heading of a page
+        # for course breadcrumbs it's just bold
+        $links .= htmltag( 'li', htmltag($CourseBreadcrumbs ? 'b' : 'h1',
+                           $lasttext), {title => $lasttext});
+
+        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);
+        }
+        #
+		
+
+        unless ($CourseBreadcrumbs) {
+            $links = htmltag('ol',  $links, { id => "LC_MenuBreadcrumbs"   });
+        } else {
+            $links = htmltag('ul',  $links, { class => "LC_CourseBreadcrumbs" });
+        }
+
+        if ($component) {
+            $links = htmltag('span', 
+                             ( $no_mt ? $component : mt($component) ).
+                             ( $icons ? $icons : '' ),
+                             { class => 'LC_breadcrumbs_component' } )
+                             .$links;
+        }
+        
+        render_tools(\$links);
+        $links = htmltag('div', $links, 
+                        { id => "LC_breadcrumbs" }) unless ($CourseBreadcrumbs) ;
+        render_advtools(\$links);
+
+        # Return the @Crumbs stack to what we started with
+        push(@Crumbs,$last);
+        shift(@Crumbs);
+        # Return the breadcrumb's line
+        return "$links";
+    }
+
+    sub clear_breadcrumbs {
+        undef(@Crumbs);
+        undef(%tools);
+    }
+
+    sub add_breadcrumb {
+        push(@Crumbs,@_);
+    }
+    
+=item add_breadcrumb_tool($category, $html)
+
+Adds $html to $category of the breadcrumb toolbar container.
+
+$html is usually a link to a page that invokes a function on the currently
+displayed data (e.g. print when viewing a problem)
+
+Currently there are 3 possible values for $category:
+
+=over
+
+=item navigation
+left of breadcrumbs line
+
+=item tools
+right of breadcrumbs line
+
+=item advtools
+advanced tools shown in a separate box below breadcrumbs line
 
 =back
 
+returns: nothing
+
+=cut
+
+    sub add_breadcrumb_tool {
+        my ($category, @html) = @_;
+        return unless @html;
+        if (!defined(%tools)) {
+            %tools = ( navigation => [], tools => [], advtools => []);
+        }
+
+        #this cleans data received from lonmenu::innerregister
+        @html = grep {defined $_ && $_ ne ''} @html;
+        for (@html) {
+            s/align="(right|left)"//;
+            s/<span.*?\/span>// if $category ne 'advtools';
+        }
+
+        push @{$tools{$category}}, @html;
+    }
+
+=item clear_breadcrumb_tools()
+
+Clears the breadcrumb toolbar container.
+
+returns: nothing
+
 =cut
 
-sub FormatStudentInformation {
-    my ($cache,$name,$studentInformation,$spacePadding)=@_;
-    my $Str='';
-    my $data;
+    sub clear_breadcrumb_tools {
+        undef(%tools);
+    }
+
+=item render_tools(\$breadcrumbs)
+
+Creates html for breadcrumb tools (categories navigation and tools) and inserts
+\$breadcrumbs at the correct position.
+
+input: \$breadcrumbs - a reference to the string containing prepared
+breadcrumbs.
+
+returns: nothing
+=cut
+
+#TODO might split this in separate functions for each category
+    sub render_tools {
+        my ($breadcrumbs) = @_;
+        return unless defined %tools;
+
+        my $navigation = list_from_array($tools{navigation},
+                   { listattr => { class=>"LC_breadcrumb_tools_navigation" } });
+        my $tools = list_from_array($tools{tools},
+                   { listattr => { class=>"LC_breadcrumb_tools_tools" } });
+        $$breadcrumbs = list_from_array([$navigation, $tools, $$breadcrumbs],
+                   { listattr => { class=>'LC_breadcrumb_tools_outerlist' } });
+    }
+
+=item render_advtools(\$breadcrumbs,$legend)
 
-    for(my $index=0; $index<(scalar @$studentInformation); $index++) {
-        if(!&ShouldShowColumn($cache, 'ChartHeading'.$index)) {
+Creates html for advanced tools (category advtools) and inserts \$breadcrumbs
+at the correct position.
+
+input: \$breadcrumbs - a reference to the string containing prepared
+breadcrumbs (after render_tools call).
+
+returns: nothing
+=cut
+
+    sub render_advtools {
+        my ($breadcrumbs,$legend) = @_;
+        return unless     (defined $tools{'advtools'})
+                      and (scalar(@{$tools{'advtools'}}) > 0);
+        my $args;
+        if ($legend) {
+            $args = {legend => $legend};
+        }
+        $$breadcrumbs .= Apache::loncommon::head_subbox(
+                            funclist_from_array($tools{'advtools'},$args));
+    }
+
+} # 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()
+# &end_pick_box()
+#
+# 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.    
+
+{ # Start: row_count block for pick_box
+my @row_count;
+
+sub start_pick_box {
+    my ($css_class) = @_;
+    if (defined($css_class)) {
+	$css_class = 'class="'.$css_class.'"';
+    } else {
+	$css_class= 'class="LC_pick_box"';
+    }
+    unshift(@row_count,0);
+    my $output = <<"END";
+ <table $css_class>
+END
+    return $output;
+}
+
+sub end_pick_box {
+    shift(@row_count);
+    my $output = <<"END";
+       </table>
+END
+    return $output;
+}
+
+sub row_headline {
+    my $output = <<"END";
+           <tr><td colspan="2">
+END
+    return $output;
+}
+
+sub row_title {
+    my ($title,$css_title_class,$css_value_class, $css_value_furtherAttributes) = @_;
+    $row_count[0]++;
+    my $css_class = ($row_count[0] % 2)?'LC_odd_row':'LC_even_row';
+    $css_title_class ||= 'LC_pick_box_title';
+    $css_title_class = 'class="'.$css_title_class.'"';
+
+    $css_value_class ||= 'LC_pick_box_value';
+
+    if ($title ne '') {
+        $title .= ':';
+    }
+    my $output = <<"ENDONE";
+           <tr class="LC_pick_box_row" $css_value_furtherAttributes> 
+            <td $css_title_class>
+	       $title
+            </td>
+            <td class="$css_value_class $css_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;
+}
+
+} # End: row_count block for pick_box
+
+sub role_select_row {
+    my ($roles,$title,$css_class,$show_separate_custom,$cdom,$cnum) = @_;
+    my $crstype = 'Course';
+    if ($cdom ne '' && $cnum ne '') {
+        $crstype = &Apache::loncommon::course_type($cdom.'_'.$cnum);
+    }
+    my $output;
+    if (defined($title)) {
+        $output = &row_title($title,$css_class);
+    }
+    $output .= qq|
+                                  <select name="roles" multiple="multiple">\n|;
+    foreach my $role (@$roles) {
+        my $plrole;
+        if ($role eq 'ow') {
+            $plrole = &mt('Course Owner');
+        } elsif ($role eq 'cr') {
+            if ($show_separate_custom) {
+                if ($cdom ne '' && $cnum ne '') {
+                    my %course_customroles = &course_custom_roles($cdom,$cnum);
+                    foreach my $crrole (sort(keys(%course_customroles))) {
+                        my ($plcrrole) = ($crrole =~ m|^cr/[^/]+/[^/]+/(.+)$|);
+                        $output .= '  <option value="'.$crrole.'">'.$plcrrole.
+                                   '</option>';
+                    }
+                }
+            } else {
+                $plrole = &mt('Custom Role');
+            }
+        } else {
+            $plrole=&Apache::lonnet::plaintext($role,$crstype);
+        }
+        if (($role ne 'cr') || (!$show_separate_custom)) {
+            $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,$crstype) = @_;
+    my $output = &row_title($title,$css_class);
+    $output .= &course_selection($formname,$totcodes,$codetitles,$idlist,$idlist_titles,$crstype);
+    $output .= &row_closure();
+    return $output;
+}
+
+sub course_selection {
+    my ($formname,$totcodes,$codetitles,$idlist,$idlist_titles,$crstype) = @_;
+    my $output = qq|
+<script type="text/javascript">
+// <![CDATA[
+    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 ($allcrs,$pickspec);
+    if ($crstype eq 'Community') {
+        $allcrs = &mt('All communities');
+        $pickspec = &mt('Pick specific communities:');
+    } else {
+        $allcrs = &mt('All courses');
+        $pickspec = &mt('Pick specific course(s):');
+    }
+
+    my $courseform='<b>'.&Apache::loncommon::selectcourse_link
+                     ($formname,'pickcourse','pickdomain','coursedesc','',1,$crstype).'</b>';
+        $output .= '<input type="radio" name="coursepick" value="all" onclick="coursePick(this.form)" />'.$allcrs.'<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','$crstype'".')" />'.$pickspec.' '.$courseform.'&nbsp;&nbsp;<input type="text" value="0" size="4" name="coursetotal" /><input type="hidden" name="courselist" value="" />selected.<br />'."\n";
+    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="multiple">\n|;
+    foreach my $status_type (sort(keys(%{$types}))) {
+        $output .= '  <option value="'.$status_type.'">'.$$types{$status_type}.'</option>';
+    }
+    $output .= qq|                   </select>\n|; 
+    if (defined($title)) {
+        $output .= &row_closure();
+    }
+    return $output;
+}
+
+sub email_default_row {
+    my ($authtypes,$title,$descrip,$css_class) = @_;
+    my $output = &row_title($title,$css_class);
+    $output .= $descrip.
+	&Apache::loncommon::start_data_table().
+	&Apache::loncommon::start_data_table_header_row().
+	'<th>'.&mt('Authentication Method').'</th>'.
+	'<th align="right">'.&mt('Username -> e-mail conversion').'</th>'."\n".
+	&Apache::loncommon::end_data_table_header_row();
+    my $rownum = 0;
+    foreach my $auth (sort(keys(%{$authtypes}))) {
+        my ($userentry,$size);
+        if ($auth =~ /^krb/) {
+            $userentry = '';
+            $size = 25;
+        } else {
+            $userentry = 'username@';
+            $size = 15;
+        }
+        $output .= &Apache::loncommon::start_data_table_row().
+	    '<td>  '.$$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 $output;
+}
+
+sub course_custom_roles {
+    my ($cdom,$cnum) = @_;
+    my %returnhash=();
+    my %coursepersonnel=&Apache::lonnet::dump('nohist_userroles',$cdom,$cnum);
+    foreach my $person (sort(keys(%coursepersonnel))) {
+        my ($role) = ($person =~ /^([^:]+):/);
+        my ($end,$start) = split(/:/,$coursepersonnel{$person});
+        if ($end == -1 && $start == -1) {
             next;
         }
-        $data=$cache->{$name.':'.$studentInformation->[$index]};
-	$Str .= $data;
+        if ($role =~ m|^cr/[^/]+/[^/]+/[^/]|) {
+            $returnhash{$role} ++;
+        }
+    }
+    return %returnhash;
+}
+
 
-	my @dataLength=split(//,$data);
-	my $length=scalar @dataLength;
-	$Str .= (' 'x($cache->{$studentInformation->[$index].'Length'}-
-                      $length));
-	$Str .= $spacePadding;
+##############################################
+##############################################
+
+# topic_bar
+#
+# Generates a div containing an (optional) number with a white background followed by a 
+# title with a background color defined in the corresponding CSS: LC_topic_bar
+# Inputs:
+# 1. number to display.
+#    If input for number is empty only the title will be displayed. 
+# 2. title text to display.
+# Outputs - a scalar containing html mark-up for the div.
+
+sub topic_bar {
+    my ($num,$title) = @_;
+    my $number = '';
+    if ($num ne '') {
+        $number = '<span>'.$num.'</span>';
     }
+    return '<div class="LC_topic_bar">'.$number.$title.'</div>';
+}
 
-    return $Str;
+##############################################
+##############################################
+# echo_form_input
+#
+# Generates html markup to add form elements from the referrer page
+# as hidden form elements (values encoded) in the new page.
+#
+# Intended to support two types of use 
+# (a) to allow backing up to earlier pages in a multi-page 
+# form submission process using a breadcrumb trail.
+#
+# (b) to allow the current page to be reloaded with form elements
+# set on previous page to remain unchanged.  An example would
+# be where the a page containing a dynamically-built table of data is 
+# is to be redisplayed, with only the sort order of the data changed. 
+#  
+# Inputs:
+# 1. Reference to array of form elements in the submitted form on 
+# the referrer page which are to be excluded from the echoed elements.
+#
+# 2. Reference to array of regular expressions, which if matched in the  
+# name of the form element n the referrer page will be omitted from echo. 
+#
+# Outputs: A scalar containing the html markup for the echoed form
+# elements (all as hidden elements, with values encoded). 
+
+
+sub echo_form_input {
+    my ($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') || ($$elements{$name} eq 'hidden')) {
+            my $numvalues = @{$values{$name}};
+            if ($numvalues > 1) {
+                my $valuestring = join('","',@{$values{$name}});
+                $output .= qq|
+  var textvalues = new Array ("$valuestring");
+  var total = courseForm.elements['$name'].length;
+  if (total > $numvalues) {
+      total = $numvalues;
+  }    
+  for (var i=0; i<total; i++) {
+      courseForm.elements['$name']\[i].value = textvalues[i];
+  }
+|;
+            } else {
+                $output .= qq|
+  courseForm.elements['$name'].value = "$values{$name}[0]";
+|;
+            }
+        } else {
+            $output .=  qq|
+  var elementLength = courseForm.elements['$name'].length;
+  if (elementLength==undefined) {
+|;
+            foreach my $value (@{$values{$name}}) {
+                if ($$elements{$name} eq 'selectbox') {
+                    $output .=  qq|
+      if (courseForm.elements['$name'].options[0].value == "$value") {
+          courseForm.elements['$name'].options[0].selected = true;
+      }|;
+                } elsif (($$elements{$name} eq 'radio') ||
+                         ($$elements{$name} eq 'checkbox')) {
+                    $output .= qq|
+      if (courseForm.elements['$name'].value == "$value") {
+          courseForm.elements['$name'].checked = true;
+      } else {
+          courseForm.elements['$name'].checked = false;
+      }|;
+                }
+            }
+            $output .= qq|
+  }
+  else {
+      for (var i=0; i<courseForm.elements['$name'].length; i++) {
+|;
+            if ($$elements{$name} eq 'selectbox') {
+                $output .=  qq|
+          courseForm.elements['$name'].options[i].selected = false;|;
+            } elsif (($$elements{$name} eq 'radio') || 
+                     ($$elements{$name} eq 'checkbox')) {
+                $output .= qq|
+          courseForm.elements['$name']\[i].checked = false;|; 
+            }
+            $output .= qq|
+      }
+      for (var j=0; j<courseForm.elements['$name'].length; j++) {
+|;
+            foreach my $value (@{$values{$name}}) {
+                if ($$elements{$name} eq 'selectbox') {
+                    $output .=  qq|
+          if (courseForm.elements['$name'].options[j].value == "$value") {
+              courseForm.elements['$name'].options[j].selected = true;
+          }|;
+                } elsif (($$elements{$name} eq 'radio') ||
+                         ($$elements{$name} eq 'checkbox')) { 
+                      $output .= qq|
+          if (courseForm.elements['$name']\[j].value == "$value") {
+              courseForm.elements['$name']\[j].checked = true;
+          }|;
+                }
+            }
+            $output .= qq|
+      }
+  }
+|;
+        }
+    }
+    $output .= "
+    return;
+}\n";
+    return $output;
+}
+
+##############################################
+##############################################
+
+# javascript_valid_email
+#
+# Generates javascript to validate an e-mail address.
+# Returns a javascript function which accetps a form field as argumnent, and
+# returns false if field.value does not satisfy two regular expression matches
+# for a valid e-mail address.  Backwards compatible with old browsers without
+# support for javascript RegExp (just checks for @ in field.value in this case). 
+
+sub javascript_valid_email {
+    my $scripttag .= <<'END';
+function validmail(field) {
+    var str = field.value;
+    if (window.RegExp) {
+        var reg1str = "(@.*@)|(\\.\\.)|(@\\.)|(\\.@)|(^\\.)";
+        var reg2str = "^.+\\@(\\[?)[a-zA-Z0-9\\-\\.]+\\.([a-zA-Z]{2,3}|[0-9]{1,3})(\\]?)$"; //"
+        var reg1 = new RegExp(reg1str);
+        var reg2 = new RegExp(reg2str);
+        if (!reg1.test(str) && reg2.test(str)) {
+            return true;
+        }
+        return false;
+    }
+    else
+    {
+        if(str.indexOf("@") >= 0) {
+            return true;
+        }
+        return false;
+    }
+}
+END
+    return $scripttag;
+}
+
+
+# USAGE: htmltag(element, content, {attribute => value,...});
+#
+# EXAMPLES: 
+#  - htmltag('a', 'this is an anchor', {href  => 'www.example.com', 
+#                                       title => 'this is a title'})
+#
+#  - You might want to set up needed tags like: 
+#
+#     my $h3  = sub { return htmltag( "h3",  @_ ) };
+#
+#    ... and use them: $h3->("This is a headline")
+#
+#  - To set up a couple of tags, see sub inittags
+#
+# NOTES:
+# - Empty elements, such as <br/> are correctly terminated, 
+#   i.e. htmltag('br') returns <br/> 
+# - Empty attributes (title="") are filtered out.
+# - The function will not check for deprecated attributes.
+#
+# OUTPUT: content enclosed in xhtml conform tags
+sub htmltag{
+    return
+        qq|<$_[0]|
+        . join( '', map { qq| $_="${$_[2]}{$_}"| if ${$_[2]}{$_} } keys %{ $_[2] } )
+        . ($_[1] ? qq|>$_[1]</$_[0]>| : qq|/>|). "\n";
+};
+
+
+# USAGE: inittags(@tags);
+#
+# EXAMPLES:
+#  - my ($h1, $h2, $h3) = inittags( qw( h1 h2 h3 ) )
+#    $h1->("This is a headline") #Returns: <h1>This is a headline</h1>
+#
+# NOTES: See sub htmltag for further information.
+#
+# OUTPUT: List of subroutines. 
+sub inittags {
+    my @tags = @_;
+    return map { my $tag = $_;
+                 sub { return htmltag( $tag, @_ ) }
+               } @tags;
+}
+
+
+# USAGE: scripttag(scriptcode, [start|end|both]);
+#
+# EXAMPLES: 
+#  - scripttag("alert('Hello World!')", 'both') 
+#    returns:
+#    <script type="text/javascript">
+#    // BEGIN LON-CAPA Internal
+#    alert(Hello World!')
+#    // END LON-CAPA Internal
+#    </script>
+#
+# NOTES:
+# - works currently only for javascripts
+#
+# OUTPUT: 
+# Scriptcode properly enclosed in <script> and CDATA tags (and LC
+# Internal markers if 2nd argument is given)
+sub scripttag {
+    my ( $content, $marker ) = @_;
+    return unless defined $content;
+
+    my $begin = "\n// BEGIN LON-CAPA Internal\n";
+    my $end   = "\n// END LON-CAPA Internal\n";
+
+    if ($marker) {
+        $content  = $begin . $content if $marker eq 'start' or $marker eq 'both';
+        $content .= $end              if $marker eq 'end'   or $marker eq 'both';
+    }
+
+    $content = "\n// <![CDATA[\n$content\n// ]]>\n";
+
+    return htmltag('script', $content, {type => 'text/javascript'});
+};
+
+
+=item list_from_array( \@array, { listattr =>{}, itemattr =>{} } )
+
+Constructs a XHTML list from \@array.
+
+input:
+
+=over
+
+=item \@array
+
+A reference to the array containing text that will be wrapped in <li></li> tags.
+
+=item { listattr => {}, itemattr =>{} }
+
+Attributes for <ul> and <li> passed in as hash references.
+See htmltag() for more details.
+
+=back
+
+returns: XHTML list as String.
+
+=cut
+
+# \@items, {listattr => { class => 'abc', id => 'xyx' }, itemattr => {class => 'abc', id => 'xyx'}}
+sub list_from_array {
+    my ($items, $args) = @_;
+    return unless scalar @$items;
+    my ($ul, $li) = inittags( qw(ul li) );
+    my $listitems = join '', map { $li->($_, $args->{itemattr}) } @$items;
+    return $ul->( $listitems, $args->{listattr} );
+}
+
+
+##############################################
+##############################################
+
+# generate_menu
+#
+# Generates html markup for a menu. 
+#
+# Inputs:
+# An array of following structure:
+#   ({	categorytitle => 'Categorytitle',
+#	items => [
+#		    {	
+#           linktext    =>	'Text to be displayed',
+#			url	        =>	'URL the link is pointing to, i.e. /adm/site?action=dosomething',
+#			permission  =>	'Contains permissions as returned from lonnet::allowed(),
+#					         must evaluate to true in order to activate the link',
+#			icon        =>  'icon filename',
+#			alttext	    =>	'alt text for the icon',
+#			help	    =>	'Name of the corresponding helpfile',
+#			linktitle   =>	'Description of the link (used for title tag)'
+#		    },
+#		    ...
+#		]
+#   }, 
+#   ...
+#   )
+#
+# Outputs: A scalar containing the html markup for the menu.
+
+sub generate_menu {
+    my @menu = @_;
+    # subs for specific html elements
+    my ($h3, $div, $ul, $li, $a, $img) = inittags( qw(h3 div ul li a img) ); 
+    
+    my @categories; # each element represents the entire markup for a category
+   
+    foreach my $category (@menu) {
+        my @links;  # contains the links for the current $category
+        foreach my $link (@{$$category{items}}) {
+            next unless $$link{permission};
+            
+            # create the markup for the current $link and push it into @links.
+            # each entry consists of an image and a text optionally followed 
+            # by a help link.
+            my $src;
+            if ($$link{icon} ne '') {
+                $src = '/res/adm/pages/'.$$link{icon};
+            }
+            push(@links,$li->(
+                        $a->(
+                            $img->("", {
+                                class => "LC_noBorder LC_middle",
+                                src   => $src,
+                                alt   => mt(defined($$link{alttext}) ?
+                                $$link{alttext} : $$link{linktext})
+                            }), {
+                            href  => $$link{url},
+                            title => mt($$link{linktitle})
+                            }).
+                        $a->(mt($$link{linktext}), {
+                            href  => $$link{url},
+                            title => mt($$link{linktitle}),
+                            class => "LC_menubuttons_link"
+                            }).
+                         (defined($$link{help}) ? 
+                         Apache::loncommon::help_open_topic($$link{help}) : ''),
+                         {class => "LC_menubuttons_inline_text"}));
+        }
+
+        # wrap categorytitle in <h3>, concatenate with 
+        # joined and in <ul> tags wrapped @links
+        # and wrap everything in an enclosing <div> and push it into
+        # @categories
+        # such that each element looks like:
+        # <div><h3>title</h3><ul><li>...</li>...</ul></div>
+        # the category won't be added if there aren't any links
+        push(@categories, 
+            $div->($h3->(mt($$category{categorytitle}), {class=>"LC_hcell"}).
+            $ul->(join('' ,@links),  {class =>"LC_ListStyleNormal" }),
+            {class=>"LC_Box LC_400Box"})) if scalar(@links);
+    }
+
+    # wrap the joined @categories in another <div> (column layout)
+    return $div->(join('', @categories), {class => "LC_columnSection"});
+}
+
+##############################################
+##############################################
+
+=pod
+
+=item &start_funclist
+
+Start list of available functions
+
+Typically used to offer a simple list of available functions
+at top or bottom of page.
+All available functions/actions for the current page
+should be included in this list.
+
+If the optional headline text is not provided, a default text will be used.
+
+
+Related routines:
+=over 4
+add_item_funclist
+end_funclist
+=back
+
+
+Inputs: (optional) headline text
+
+Returns: HTML code with function list start
+
+=cut
+
+##############################################
+##############################################
+
+sub start_funclist {
+    my($legendtext)=@_;
+    $legendtext=&mt('Functions') if !$legendtext;
+    return '<ul class="LC_funclist"><li style="font-weight:bold; margin-left:0.8em;">'.$legendtext.'</li>'."\n";
+}
+
+
+##############################################
+##############################################
+
+=pod
+
+=item &add_item_funclist
+
+Adds an item to the list of available functions
+
+Related routines:
+=over 4
+start_funclist
+end_funclist
+=back
+
+Inputs: content item with text and link to function
+
+Returns: HTML code with list item for funclist
+
+=cut
+
+##############################################
+##############################################
+
+sub add_item_funclist {
+    my($content) = @_;
+    return '<li>'.$content.'</li>'."\n";
+}
+
+=pod
+
+=item &end_funclist
+
+End list of available functions
+
+Related routines:
+=over 4
+start_funclist
+add_item_funclist
+=back
+
+Inputs: ./.
+
+Returns: HTML code with function list end
+=cut
+
+sub end_funclist {
+    return "</ul>\n";
+}
+
+=pod
+
+=item funclist_from_array( \@array, {legend => 'text for legend'} )
+
+Constructs a XHTML list from \@array with the first item being visually
+highlighted and set to the value of legend or 'Functions' if legend is
+empty.
+
+=over
+
+=item \@array
+
+A reference to the array containing text that will be wrapped in <li></li> tags.
+
+=item { legend => 'text' }
+
+A string that's used as visually highlighted first item. 'Functions' is used if
+it's value evaluates to false.
+
+=back
+
+returns: XHTML list as string.
+
+=back
+
+=cut
+
+sub funclist_from_array {
+    my ($items, $args) = @_;
+    $args->{legend} ||= mt('Functions');
+    return list_from_array( [$args->{legend}, @$items],
+               { listattr => {class => 'LC_funclist'} });
 }
 
 1;
+
 __END__