--- loncom/interface/statistics/lonproblemanalysis.pm	2006/08/17 21:19:47	1.127
+++ loncom/interface/statistics/lonproblemanalysis.pm	2014/02/26 17:46:19	1.146
@@ -1,6 +1,6 @@
 # The LearningOnline Network with CAPA
 #
-# $Id: lonproblemanalysis.pm,v 1.127 2006/08/17 21:19:47 raeburn Exp $
+# $Id: lonproblemanalysis.pm,v 1.146 2014/02/26 17:46:19 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -31,6 +31,7 @@ use Apache::lonnet;
 use Apache::loncommon();
 use Apache::lonhtmlcommon();
 use Apache::loncoursedata();
+use Apache::lonquickgrades();
 use Apache::lonstatistics;
 use Apache::lonlocal;
 use Apache::lonstathelpers();
@@ -73,12 +74,18 @@ sub BuildProblemAnalysisPage {
     #
     &Apache::lonstatistics::PrepareClasslist();
     #
+    $r->print(&Apache::lonhtmlcommon::breadcrumbs('Detailed Problem Analysis'));
+    &Apache::lonquickgrades::startGradeScreen($r,'statistics');
+
     $r->print(&CreateInterface());
     #
     my @Students = @Apache::lonstatistics::Students;
     #
     if (@Students < 1 && exists($env{'form.firstrun'})) {
-        $r->print('<h2>There are no students in the sections/groups selected</h2>');
+        $r->print('<div class="LC_warning">'
+                 .&mt('There are no students in the sections/groups selected.')
+                 .'</div>'
+        );
     }
     #
     my @CacheButtonHTML = 
@@ -139,30 +146,39 @@ sub BuildProblemAnalysisPage {
             my $resource = $current_problem->{'resource'};
             $r->print('<h1>'.$resource->compTitle.'</h1>');
             $r->print('<h3>'.$resource->src.'</h3>');
-            $r->print('<h4>'.&Apache::lonstatistics::section_and_enrollment_description().'</h4>');
+            $r->print('<p>'.&Apache::lonstatistics::section_and_enrollment_description().'</p>');
             if ($env{'form.show_prob'} eq 'true') {
-                $r->print(&Apache::lonstathelpers::render_resource($resource));
+                $r->print('<hr />'
+                         .&Apache::lonstathelpers::render_resource($resource)
+                         .'<hr />'
+                );
             }
             $r->rflush();
-            my %Data = &Apache::lonstathelpers::get_problem_data
-                ($resource->src);
-            my $problem_data = $Data{$current_problem->{'part'}.
-                                    '.'.
-                                    $current_problem->{'respid'}};
-            if ($current_problem->{'resptype'} eq 'option') {
-                &OptionResponseAnalysis($r,$current_problem,
-                                        $problem_data,
-                                        \@Students);
-            } elsif ($current_problem->{'resptype'} eq 'radiobutton') {
-                &radio_response_analysis($r,$current_problem,
-                                         $problem_data,
-                                         \@Students);
-            } elsif ($current_problem->{'resptype'} eq 'numerical') {
-                &numerical_response_analysis($r,$current_problem,
-                                             $problem_data,\@Students);
-            } else {
-                $r->print('<h2>Analysis of '.$current_problem->{'resptype'}.' is not supported</h2>');
-            }
+	    if (@Students) {
+		my %Data = &Apache::lonstathelpers::get_problem_data
+		    ($resource->src);
+		my $problem_data = $Data{$current_problem->{'part'}.
+					     '.'.
+					     $current_problem->{'respid'}};
+		if ($current_problem->{'resptype'} eq 'option') {
+		    &OptionResponseAnalysis($r,$current_problem,
+					    $problem_data,
+					    \@Students);
+		} elsif ($current_problem->{'resptype'} eq 'radiobutton') {
+		    &radio_response_analysis($r,$current_problem,
+					     $problem_data,
+					     \@Students);
+		} elsif ($current_problem->{'resptype'} eq 'numerical') {
+		    &numerical_response_analysis($r,$current_problem,
+						 $problem_data,\@Students);
+		} else {
+		    $r->print('<div class="LC_warning">'
+                             .&mt('Analysis of [_1] is not supported.'
+                                 ,$current_problem->{'resptype'})
+                             .'</div>'
+                    );
+		}
+	    }
         }
         $r->print('<hr />');
     } else {
@@ -212,9 +228,10 @@ sub numerical_response_analysis {
     }
     #
     if (ref($response_data) ne 'ARRAY') {
-        $r->print('<h2>'.
-                  &mt('There is no submission data for this resource').
-                  '</h2>');
+        $r->print('<div class="LC_warning">'
+                 .&mt('There is no submission data for this resource.')
+                 .'</div>'
+        );
         return;
     }
     my $analysis_html = '<table>';
@@ -231,7 +248,7 @@ sub numerical_response_analysis {
             $stats_message = 
                 '[_1] submissions, [_2] correct, [_3] incorrect';
             $post_message = '';
-            $no_data_message = 'No data exists for attempt [_1]';
+            $no_data_message = 'No data exists for attempt [_1].';
         } else {
             my $starttime = &Apache::lonhtmlcommon::get_date_from_form
                 ('startdate_'.$plot_num);
@@ -279,9 +296,9 @@ sub numerical_response_analysis {
                                           $restriction_function);
         if ($stats->{'submission_count'} == 0) {
             $analysis_html.= 
-                '<tr><td colspan="2"><font size="+1"><b>'.
+                '<tr><td colspan="2"><div class="LC_warning">'.
                 &mt($no_data_message,$plot_num,@extra_data).
-                '</b></font></td></tr>';
+                '</div></td></tr>';
         } else {
             $analysis_html.= 
                 '<tr><td colspan="2" align="center"><font size="+1"><b>'.
@@ -327,11 +344,14 @@ sub numerical_plot_percent {
             last;
         }
     }
+    $percent_spread = $highest_percent - $lowest_percent;
     my $bin_size = 1;
     foreach (qw/0.01 0.05 0.1 0.5 1 2 5 10 20 25 50 100/) {
         if ($lowest_percent/2 < $_){
             $bin_size = $_;
-            last;
+	    if ( ($percent_spread/$bin_size) < $max_bins ) {
+		last;
+	    }
         }
     }
     my @bins;
@@ -380,10 +400,13 @@ sub numerical_plot_percent {
         if ($max <$_) { $max = $_; last; }
     }
     #
-    my $title = &mt('Percent Difference');
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Percent Difference',
+                 'xlabel' => 'Percent Difference from Correct',
+                 'ylabel' => 'Percent of Answers');
     my @labels = (1..scalar(@bins)-1);
     my $graph = &Apache::loncommon::DrawBarGraph
-        ($title,'Percent Difference from Correct','Percent of Answers',
+        ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
          $max,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
          {xskip=>1});
     #
@@ -406,6 +429,10 @@ sub numerical_plot_differences {
     } elsif ($low_bin < 0 && $high_bin < -$low_bin) {
         $high_bin = -$low_bin;
     }
+    if ($high_bin == $low_bin) {
+	$high_bin+=1;
+	$low_bin-=1;
+    }
     if (!$min_bin_size ||
         ($high_bin -$low_bin)/$min_bin_size * 2 > $max_bins) {
         $min_bin_size = abs($high_bin - $low_bin) / $max_bins * 2;
@@ -449,10 +476,13 @@ sub numerical_plot_differences {
         if ($max <$_) { $max = $_; last; }
     }
     #
-    my $title = &mt('Difference between submission and correct');
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Difference between submission and correct',
+                 'xlabel' => 'Difference from Correct',
+                 'ylabel' => 'Percent of Answers');
     my @labels = (1..scalar(@bins)-1);
     my $graph = &Apache::loncommon::DrawBarGraph
-        ($title,'Difference from Correct','Percent of Answers',
+        ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
          $max,['#33FF00','#FF3300'],\@labels,\@plot_correct,\@plot_incorrect,
          {xskip=>1});
     #
@@ -606,10 +636,7 @@ sub numerical_determine_answers {
     my ($r,$resource,$partid,$respid,$students)=@_;
     my $c = $r->connection();
     #
-    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin
-        ($r,'Student Answer Compilation Status',
-         'Student Answer Compilation Progress', scalar(@$students),
-         'inline',undef,'Statistics','stats_status');
+    my %prog_state=&Apache::lonhtmlcommon::Create_PrgWin($r,scalar(@$students));
     #
     # Read in the cache (if it exists) before we start timing things.
     &Apache::lonstathelpers::ensure_proper_cache($resource->{'symb'});
@@ -627,13 +654,23 @@ sub numerical_determine_answers {
                                                                 $sdom);
         # make the key
         my $key = $partid.'.'.$respid;
+	# pick one of the possible answers
+	my $which = 'INTERNAL';
+	if (!exists($analysis->{$key}{$which})) {
+	    $which = (sort(keys(%{ $analysis->{$key} })))[0];
+	}
         foreach my $item ('answer','unit','ans_high','ans_low') {
-            $correct->{$sname.':'.$sdom}->{$item} = 
-                $analysis->{$key.'.'.$item}->[0];
+	    if (ref($analysis->{$key.'.'.$item}) eq 'ARRAY') {
+		$correct->{$sname.':'.$sdom}->{$item} = 
+		    $analysis->{$key.'.'.$item}[0];
+	    } else {
+		$correct->{$sname.':'.$sdom}->{$item} = 
+		    $analysis->{$key.'.'.$item}{$which}[0][0];
+	    }
         }
-        $answers{$analysis->{$key.'.answer'}->[0]}++;
+        $answers{$correct->{$sname.':'.$sdom}{'answer'}}++;
         &Apache::lonhtmlcommon::Increment_PrgWin($r,\%prog_state,
-                                                 &mt('last student'));
+                                                     'last student');
     }
     &Apache::lonstathelpers::write_analysis_cache();
     &Apache::lonhtmlcommon::Close_PrgWin($r,\%prog_state);
@@ -811,9 +848,9 @@ sub radio_response_analysis {
     }
     #
     if (! defined($response_data) || ref($response_data) ne 'ARRAY' ) {
-        $analysis_html = '<h2>'.
-            &mt('There is no submission data for this resource').
-            '</h2>';
+        $analysis_html = '<div class="LC_warning">'
+                        .&mt('There is no submission data for this resource.')
+                        .'</div>';
         $r->print($analysis_html);
         return;
     }
@@ -827,8 +864,8 @@ sub radio_response_analysis {
             $no_data_text,@extra_data);
         if ($env{'form.AnalyzeOver'} eq 'tries') {
             $restriction_function = sub {($_[0]->{'tries'} == $plot_num?1:0)};
-            $correct_foil_title = 'Attempt '.$plot_num;
-            $incorrect_foil_title = 'Attempt '.$plot_num;
+            $correct_foil_title = &mt('Attempt [_1]',$plot_num);
+            $incorrect_foil_title = &mt('Attempt [_1]',$plot_num);
             $pre_graph_text = 
                 'Attempt [_1], [_2] submissions, [_3] correct, [_4] incorrect';
             $post_graph_text = '';
@@ -844,7 +881,9 @@ sub radio_response_analysis {
                  &get_time_from_row($response_data->[-1]),
                  $plot_num);
             $pre_graph_text = 
-                'Data from [_6] to [_7]<br /> [_2] submissions from [_5] students, [_3] correct, [_4] incorrect';
+                'Data from [_6] to [_7]'
+               .'<br />'
+               .'[_2] submissions from [_5] students, [_3] correct, [_4] incorrect';
             $extra_data[0] = &Apache::lonlocal::locallocaltime($starttime);
             $extra_data[1] = &Apache::lonlocal::locallocaltime($endtime);
             #
@@ -884,8 +923,9 @@ sub radio_response_analysis {
         # Concept Plot
         my $concept_plot = '';
         if (scalar(@$concepts) > 1) {
+            my $title = &mt('Correct Concepts');
             $concept_plot = &RR_concept_plot($concepts,$foil_choice_data,
-                                             'Correct Concepts');
+                                             $title);
         }
         # % Choosing plot
         my $choice_plot = &RR_create_percent_selected_plot
@@ -932,11 +972,13 @@ sub radio_response_analysis {
             }
         } elsif ($no_data_text ne '') {
             $analysis_html.='<tr><td colspan="4" align="center">'.
+                '<div class="LC_warning">'.
                 &mt($no_data_text,
                     $plot_num,$foil_choice_data->{'_count'},
                     $correct,                    
                     $foil_choice_data->{'_count'}-$correct,
-                    @extra_data);
+                    @extra_data).
+                '</div>';
             if (defined($post_graph_text)) {
                 $analysis_html.='<br />'.$post_graph_text;
             }
@@ -998,10 +1040,11 @@ sub RR_concept_plot {
     for (my $i=0;$i<=$#correct;$i++) { 
         $correct[$i] = sprintf('%0f',$correct[$i]/$total*100);
     }
-    my $xlabel = 'concept';
+    my $xlabel = &mt('concept');
+    my $ylabel = &mt('Percent Choosing');
     my $plot=  &Apache::loncommon::DrawBarGraph($title,
                                                 $xlabel,
-                                                'Percent Choosing',
+                                                $ylabel,
                                                 100,
                                                 ['#33ff00','#ff3300'],
                                                 undef,
@@ -1067,10 +1110,11 @@ sub RR_create_percent_selected_plot {
         @labels = (1 .. scalar(@correct));
     }
     #
-    my $xlabel = 'foil chosen';
+    my $xlabel = &mt('foil chosen');
+    my $ylabel = &mt('Percent Choosing');
     my $plot=  &Apache::loncommon::DrawBarGraph($title,
                                                 $xlabel,
-                                                'Percent Choosing',
+                                                $ylabel,
                                                 100,
                                                 ['#33ff00','#ff3300'],
                                                 \@labels,
@@ -1131,8 +1175,10 @@ sub RR_create_stacked_selection_plot {
         push(@empty_row,0);
     }
     #
+    my $xlabel = &mt('Correct Foil');
+    my $ylabel = &mt('foils chosen Incorrectly');
     my $graph = &Apache::loncommon::DrawBarGraph
-        ($title,'Correct Foil','foils chosen Incorrectly',
+        ($title,$xlabel,$ylabel,
          100,$plotcolors,\@labels,\@empty_row,@dataset);
     return ($graph,\%count_per_foil);
 }
@@ -1198,9 +1244,10 @@ sub OptionResponseAnalysis {
          $resource->symb,$respid);
     if (! defined($PerformanceData) || 
         ref($PerformanceData) ne 'ARRAY' ) {
-        $r->print('<h2>'.
-                  &mt('There is no student data for this problem.').
-                  '</h2>');
+        $r->print('<div class="LC_warning">'
+                 .&mt('There is no student data for this problem.')
+                 .'</div>'
+        );
     }  else {
         $r->rflush();
         if ($env{'form.AnalyzeOver'} eq 'tries') {
@@ -1215,10 +1262,10 @@ sub OptionResponseAnalysis {
             $r->print($analysis_html);
             $r->rflush();
         } else {
-            $r->print('<h2>'.
-                      &mt('The analysis you have selected is '.
-                          'not supported at this time').
-                      '</h2>');
+            $r->print('<div class="LC_warning">'
+                     .&mt('The analysis you have selected is not supported at this time.')
+                     .'</div>'
+            );
         }
     }
 }
@@ -1295,12 +1342,18 @@ sub OR_tries_analysis {
         if (! defined($response_data{'_total'}->[$try]) ||
             $response_data{'_total'}->[$try] == 0) { 
             if ($try > 1) {
-                $analysis_html.= '<tr><td align="center" colspan="4"><b>'.
-                    &mt('None of the selected students attempted the problem more than [_1] times.',$try-1).
-                    '</b></td></tr>';
+                $analysis_html.= '<tr><td colspan="4">'
+                                .'<div class="LC_info">'
+                                .&mt('None of the selected students attempted the problem more than [quant,_1,time].'
+                                    ,$try-1)
+                                .'</div>'
+                                .'</td></tr>';
             } else {
-                $analysis_html.= '<tr><td colspan="4" align="center"><b>'.
-                    &mt('None of the selected students have attempted the problem').'</b></td></tr>';
+                $analysis_html.= '<tr><td colspan="4">'
+                                .'<div class="LC_info">'
+                                .&mt('None of the selected students have attempted the problem.')
+                                .'</div>'
+                                .'</td></tr>';
             }
             last;
         }
@@ -1321,8 +1374,12 @@ sub OR_tries_analysis {
                 }
             }
             #
+            my %lt = &Apache::lonlocal::texthash(
+                         'title'  => 'Correct Concepts',
+                         'xlabel' => 'Concept Number',
+                         'ylabel' => 'Percent Correct');
             $concept_graph = &Apache::loncommon::DrawBarGraph
-                ('Correct Concepts','Concept Number','Percent Correct',
+                ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
                  100,$plotcolors,undef,\@concept_plot_data,{xskip=>1});
         }
         #
@@ -1360,8 +1417,12 @@ sub OR_tries_analysis {
             push(@Labels,'');
         }
         #
+       my %lt = &Apache::lonlocal::texthash(
+                    'title'  => 'Correct Statements',
+                    'xlabel' => 'Statement',
+                    'ylabel' => '% Answered Correct');
         my $correct_graph = &Apache::loncommon::DrawBarGraph
-            ('Correct Statements','Statement','% Answered Correct',
+            ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
              100,$plotcolors,\@Labels,$Datasets[0],{xskip=>1});
         
         #
@@ -1372,8 +1433,12 @@ sub OR_tries_analysis {
         }
         my $count = $response_data{'_total'}->[$try] - 
                                            $response_data{'_correct'}->[$try];
+        %lt = &Apache::lonlocal::texthash(
+                  'title'  => 'Incorrect Statements',
+                  'xlabel' => 'Statement',
+                  'ylabel' => '% Chosen Incorrectly');
         my $incorrect_graph = &Apache::loncommon::DrawBarGraph
-            ('Incorrect Statements','Statement','% Chosen Incorrectly',
+            ($lt{'title'},$lt{'xlabel'},$lt{'ylabel'},
              100,$plotcolors,\@Labels,@Datasets,{xskip=>1});
         $analysis_html.= 
             '<tr><td colspan="4" align="center">'.
@@ -1435,10 +1500,11 @@ sub OR_time_analysis {
     if (defined($Concepts)) { $num_concepts = scalar(@$Concepts); }
     #
     if ($num_concepts < 2) {
-        $table = '<h3>'.
-            &mt('Not enough data for concept analysis.  '.
-                'Performing Foil Analysis').
-                '</h3>'.$table;
+        $table = '<p class="LC_info">'.
+                 &mt('Not enough data for concept analysis.'.
+                     ' Performing Foil Analysis instead.').
+                 '</p>'.
+                 $table;
     }
     #
     my $num_plots = $env{'form.NumPlots'};
@@ -1495,7 +1561,7 @@ sub OR_time_analysis {
         $correct |= 0;
         ##
         $table .= '<tr><td colspan="4" align="center"><font size="+1">'.
-            &mt('[_1] submissions from [_2] students, [_3] correct, [_4] incorrect',
+            &mt('[quant,_1,submission,submissions,No submissions] from [quant,_2,student], [_3] correct, [_4] incorrect',
                 $data_count,$student_count,$correct,$data_count-$correct).
                 '</font></td></tr>'.$/;
         my $concept_correct_plot = '';
@@ -1517,7 +1583,7 @@ sub OR_time_analysis {
         $table .= '<tr><td colspan="4" align="center">'.
             &mt('Start time: [_1]',$startdateform).'<br />'.
             &mt('End time: [_1]',$enddateform).'</td></tr>'.$/;
-        $table.= '<tr><td colspan="4">&nbsp</td></tr>'.$/;
+        $table.= '<tr><td colspan="4">&nbsp;</td></tr>'.$/;
     }
     $table .= '</table>';
     #
@@ -1528,7 +1594,11 @@ sub OR_Foil_Time_Analysis {
     my ($processed_time_data,$correct,$data_count,$student_count,
         $ORdata,$Foils,$Concepts) = @_;
     if ($data_count <= 0) {
-        return ('<h2>'.&mt('There is no data to plot').'</h2>','');
+        return ('<div class="LC_warning">'
+               .&mt('There is no data to plot.')
+               .'</div>'
+               ,''
+        );
     }
     my $analysis_html;
     my @plotdata;
@@ -1563,9 +1633,13 @@ sub OR_Foil_Time_Analysis {
     }
     #
     # Create the plot
-    my $correct_plot = &Apache::loncommon::DrawBarGraph('Correct Statements',
-                                                        'Statement Number',
-                                                        'Percent Correct',
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Correct Statements',
+                 'xlabel' => 'Statement Number',
+                 'ylabel' => 'Percent Correct');
+    my $correct_plot = &Apache::loncommon::DrawBarGraph($lt{'title'},
+                                                        $lt{'xlabel'},
+                                                        $lt{'ylabel'},
                                                         100,
                                                         $plotcolors,
                                                         undef,
@@ -1574,10 +1648,14 @@ sub OR_Foil_Time_Analysis {
     for (my $j=0; $j< scalar(@{$plotdata[0]});$j++) {
         $plotdata[0]->[$j]=0;
     }
+    %lt = &Apache::lonlocal::texthash(
+              'title'  => 'Incorrect Statements',
+              'xlabel' => 'Statement Number',
+              'ylabel' => 'Incorrect Option Choice');
     my $incorrect_plot = 
-        &Apache::loncommon::DrawBarGraph('Incorrect Statements',
-                                         'Statement Number',
-                                         'Incorrect Option Choice',
+        &Apache::loncommon::DrawBarGraph($lt{'title'},
+                                         $lt{'xlabel'},
+                                         $lt{'ylabel'},
                                          100,
                                          $plotcolors,
                                          undef,
@@ -1606,9 +1684,13 @@ sub OR_Concept_Time_Analysis {
     }
     #
     # Create the plot
-    return &Apache::loncommon::DrawBarGraph('Correct Concepts',
-                                            'Concept Number',
-                                            'Percent Correct',
+    my %lt = &Apache::lonlocal::texthash(
+                 'title'  => 'Correct Concepts',
+                 'xlabel' => 'Concept Number',
+                 'ylabel' => 'Percent Correct');
+    return &Apache::loncommon::DrawBarGraph($lt{'title'},
+                                            $lt{'xlabel'},
+                                            $lt{'ylabel'},
                                             100,
                                             $plotcolors,
                                             undef,
@@ -1704,23 +1786,23 @@ sub build_foil_index {
     }
     #
     # Build up the table of row labels.
-    my $table = '<table border="1" >'."\n";
+    my $table = &Apache::loncommon::start_data_table();
     if (@Concepts > 1) {
-        $table .= '<tr>'.
+        $table .= &Apache::loncommon::start_data_table_header_row().
             '<th>'.&mt('Concept Number').'</th>'.
             '<th>'.&mt('Concept').'</th>'.
             '<th>'.&mt('Foil Number').'</th>'.
             '<th>'.&mt('Foil Name').'</th>'.
             '<th>'.&mt('Foil Text').'</th>'.
             '<th>'.&mt('Correct Value').'</th>'.
-            "</tr>\n";
+            &Apache::loncommon::end_data_table_header_row();
     } else {
-        $table .= '<tr>'.
+        $table .= &Apache::loncommon::start_data_table_header_row().
             '<th>'.&mt('Foil Number').'</th>'.
             '<th>'.&mt('Foil Name').'</th>'.
             '<th>'.&mt('Foil Text').'</th>'.
             '<th>'.&mt('Correct Value').'</th>'.
-            "</tr>\n";
+            &Apache::loncommon::end_data_table_header_row();
     }        
     my $conceptindex = 1;
     my $foilindex = 1;
@@ -1728,39 +1810,39 @@ sub build_foil_index {
         my @FoilsInConcept = @{$concept->{'foils'}};
         my $firstfoil = shift(@FoilsInConcept);
         if (@Concepts > 1) {
-            $table .= '<tr>'.
+            $table .= &Apache::loncommon::start_data_table_row().
                 '<td>'.$conceptindex.'</td>'.
                 '<td>'.&HTML::Entities::encode($concept->{'name'},'<>&"').'</td>'.
                 '<td>'.$foilindex++.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'},'<>&"').'</td>'.
                 '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'},'<>&"').'</td>'.
-                "</tr>\n";
+                &Apache::loncommon::end_data_table_row();
         } else {
-            $table .= '<tr>'.
+            $table .= &Apache::loncommon::start_data_table_row().
                 '<td>'.$foilindex++.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'name'},'<>&"').'</td>'.
                 '<td>'.$Foildata{$firstfoil}->{'text'}.'</td>'.
                 '<td>'.&HTML::Entities::encode($Foildata{$firstfoil}->{'value'},'<>&"').'</td>'.
-                "</tr>\n";
+                &Apache::loncommon::end_data_table_row();
         }
         foreach my $foilid (@FoilsInConcept) {
             if (@Concepts > 1) {
-                $table .= '<tr>'.
+                $table .= &Apache::loncommon::start_data_table_row().
                     '<td></td>'.
                     '<td></td>'.
                     '<td>'.$foilindex.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'},'<>&"').'</td>'.
                     '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'},'<>&"').'</td>'.
-                    "</tr>\n";
+                    &Apache::loncommon::end_data_table_row();
             } else {
-                $table .= '<tr>'.
+                $table .= &Apache::loncommon::start_data_table_row().
                     '<td>'.$foilindex.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'name'},'<>&"').'</td>'.
                     '<td>'.$Foildata{$foilid}->{'text'}.'</td>'.
                     '<td>'.&HTML::Entities::encode($Foildata{$foilid}->{'value'},'<>&"').'</td>'.
-                    "</tr>\n";
+                    &Apache::loncommon::end_data_table_row();
             }                
         } continue {
             $foilindex++;
@@ -1768,7 +1850,7 @@ sub build_foil_index {
     } continue {
         $conceptindex++;
     }
-    $table .= "</table>\n";
+    $table .= &Apache::loncommon::end_data_table();
     #
     # Build option index with color stuff
     return ($table,\@Foils,\@Concepts);
@@ -1830,17 +1912,18 @@ sub CreateInterface {
     ##
     ## Build the menu
     my $Str = '';
-    $Str .= &Apache::lonhtmlcommon::breadcrumbs('Detailed Problem Analysis');
-    $Str .= '<table cellspacing="5">'."\n";
-    $Str .= '<tr>';
-    $Str .= '<td align="center"><b>'.&mt('Sections').'</b></td>';
-    $Str .= '<td align="center"><b>'.&mt('Groups').'</b></td>';
-    $Str .= '<td align="center"><b>'.&mt('Enrollment Status').'</b></td>';
-    $Str .= '<td align="center">&nbsp;</td>';
-    $Str .= '</tr>'."\n";
+    $Str .= '<p>';
+    $Str .= &Apache::loncommon::start_data_table();
+    $Str .= &Apache::loncommon::start_data_table_header_row();
+    $Str .= '<th>'.&mt('Sections').'</th>';
+    $Str .= '<th>'.&mt('Groups').'</th>';
+    $Str .= '<th>'.&mt('Access Status').'</th>';
+    $Str .= '<th>'.&mt('Options').'</th>';
+    $Str .= &Apache::loncommon::end_data_table_header_row();
     ##
     ## 
-    $Str .= '<tr><td align="center">'."\n";
+    $Str .= &Apache::loncommon::start_data_table_row();
+    $Str .= '<td align="center">'."\n";
     $Str .= &Apache::lonstatistics::SectionSelect('Section','multiple',5);
     $Str .= '</td>';
     #
@@ -1854,35 +1937,35 @@ sub CreateInterface {
     #
     ##
     ##
-    $Str .= '<td>';
+    $Str .= '<td valign="top">';
     ##
     my $showprob_checkbox = 
-        '<input type="checkbox" name="show_prob" value="true" ';
+        '<input type="checkbox" name="show_prob" value="true"';
     if ($env{'form.show_prob'} eq 'true') {
-        $showprob_checkbox .= 'checked ';
+        $showprob_checkbox .= ' checked="checked"';
     }
     $showprob_checkbox.= ' />';
-    $Str.= '<nobr><label>'.
-        &mt('Show problem [_1]',$showprob_checkbox).
-        '</label></nobr><br />';
+    $Str.= '<span class="LC_nobreak"><label>'.
+        $showprob_checkbox.' '.&mt('Show problem').
+        '</label></span><br />';
     ##
-    my $analyze_selector = '<select name="AnalyzeOver" >';
-    $analyze_selector .= '<option value="tries" ';
+    my $analyze_selector = '<select name="AnalyzeOver">';
+    $analyze_selector .= '<option value="tries"';
     if (! exists($env{'form.AnalyzeOver'}) || 
         $env{'form.AnalyzeOver'} eq 'tries'){
         # Default to tries
-        $analyze_selector .= ' selected ';
+        $analyze_selector .= ' selected="selected"';
     }
     $analyze_selector .= '>'.&mt('Tries').'</option>';
-    $analyze_selector .= '<option value="time" ';
-    $analyze_selector .= ' selected ' if ($env{'form.AnalyzeOver'} eq 'time');
+    $analyze_selector .= '<option value="time"';
+    $analyze_selector .= ' selected="selected"' if ($env{'form.AnalyzeOver'} eq 'time');
     $analyze_selector .= '>'.&mt('Time').'</option>';
     $analyze_selector .= '</select>';
-    $Str .= '<nobr><label>'.
+    $Str .= '<span class="LC_nobreak"><label>'.
         &mt('Analyze Over [_1] [_2]',
             $analyze_selector,
             &Apache::loncommon::help_open_topic('Analysis_Analyze_Over')).
-            '</label></nobr><br />'.$/;
+            '</label></span><br />'.$/;
     ##
     my $numplots_selector = '<select name="NumPlots">';
     if (! exists($env{'form.NumPlots'}) 
@@ -1892,23 +1975,24 @@ sub CreateInterface {
     }
     foreach my $i (1,2,3,4,5,6,7,8,10,15,20) {
         $numplots_selector .= '<option value="'.$i.'" ';
-        if ($env{'form.NumPlots'} == $i) { $numplots_selector.=' selected '; }
+        if ($env{'form.NumPlots'} == $i) { $numplots_selector.=' selected="selected" '; }
         $numplots_selector .= '>'.$i.'</option>';
     }
-    $numplots_selector .= '</select></nobr><br />';
-    $Str .= '<nobr><label>'.&mt('Number of Plots [_1]',$numplots_selector).
-        '</label></nobr>';
+    $numplots_selector .= '</select>';
+    $Str .= '<span class="LC_nobreak"><label>'.&mt('Number of Plots [_1]',$numplots_selector).
+        '</label></span><br />';
     ##
-    $Str .= '<nobr><label>'.&mt('Status: [_1]',
-                                 '<input type="text" '.
-                                 'name="stats_status" size="60" value="" />'
-                                 ).
-                    '</label></nobr>';
     $Str .= '</td>';
     ##
     ##
-    $Str .= '</tr>'."\n";
-    $Str .= '</table>'."\n";
+    $Str .= &Apache::loncommon::end_data_table_row();
+    $Str .= &Apache::loncommon::end_data_table();
+    $Str .= '<p class="LC_nobreak"><label>'
+           .&mt('Status: [_1]',
+                    '<input type="text" name="stats_status"'
+                   .' size="60" value="" readonly="readonly" />')
+           .'</label></p>';
+    $Str .= '</p>';
     return $Str;
 }