--- loncom/interface/lonnavmaps.pm	2009/11/02 12:10:34	1.438
+++ loncom/interface/lonnavmaps.pm	2009/12/27 01:31:05	1.441
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavmaps.pm,v 1.438 2009/11/02 12:10:34 wenzelju Exp $
+# $Id: lonnavmaps.pm,v 1.441 2009/12/27 01:31:05 raeburn Exp $
 
 #
 # Copyright Michigan State University Board of Trustees
@@ -49,7 +49,7 @@ described at http://www.lon-capa.org.
 
 =head1 OVERVIEW
 
-X<lonnavmaps, overview When a user enters a course, LON-CAPA examines the
+X<lonnavmaps, overview> When a user enters a course, LON-CAPA examines the
 course structure and caches it in what is often referred to as the
 "big hash" X<big hash>. You can see it if you are logged into
 LON-CAPA, in a course, by going to /adm/test. (You may need to
@@ -506,10 +506,12 @@ my %statusIconMap =
      );
 
 my %iconAltTags =   #texthash does not work here
-    ( 'navmap.correct.gif' => 'Correct',
-      'navmap.wrong.gif'   => 'Incorrect',
-      'navmap.open.gif'    => 'Open',
-      'navmap.partial.gif' => 'Partially Correct', );
+    ( 'navmap.correct.gif'  => 'Correct',
+      'navmap.wrong.gif'    => 'Incorrect',
+      'navmap.open.gif'     => 'Open',
+      'navmap.partial.gif'  => 'Partially Correct',
+      'navmap.ellipsis.gif' => 'Attempted',
+     );
 
 # Defines a status->color mapping, null string means don't color
 my %colormap = 
@@ -1526,7 +1528,6 @@ END
         ( $res->NETWORK_FAILURE    => 1,
           $res->NOTHING_SET        => 1,
           $res->CORRECT            => 1 );
-    my @backgroundColors = ("LC_trEven", "LC_trOdd");
 
     # Shared variables
     $args->{'counter'} = 0; # counts the rows
@@ -1761,7 +1762,6 @@ END
         # show them.
         foreach my $part (@parts) {
             $rownum ++;
-            my $backgroundColor = $backgroundColors[$rownum % scalar(@backgroundColors)];
             
             $result .= &Apache::loncommon::start_data_table_row();
 
@@ -3532,7 +3532,11 @@ sub navHash {
     my $self = shift;
     my $param = shift;
     my $id = shift;
-    return $self->{NAV_MAP}->navhash($param . ($id?$self->{ID}:""));
+    my $arg = $param . ($id?$self->{ID}:"");
+    if (defined($arg)) {
+        return $self->{NAV_MAP}->navhash($arg);
+    }
+    return;
 }
 
 =pod