--- loncom/interface/lonnavdisplay.pm	2011/12/28 04:11:05	1.21
+++ loncom/interface/lonnavdisplay.pm	2013/08/07 00:03:25	1.23
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Navigate Maps Handler
 #
-# $Id: lonnavdisplay.pm,v 1.21 2011/12/28 04:11:05 raeburn Exp $
+# $Id: lonnavdisplay.pm,v 1.23 2013/08/07 00:03:25 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -292,8 +292,17 @@ sub startContentScreen {
     my ($r,$mode)=@_;
 
     $r->print("\n".'<ul class="LC_TabContentBigger" id="mainnav">'."\n");
-    $r->print('<li'.(($mode eq 'navmaps')?' class="active"':'').'><a href="/adm/navmaps"><b>&nbsp;&nbsp;&nbsp;&nbsp;'.&mt('Main Content').'&nbsp;&nbsp;&nbsp;&nbsp;</b></a></li>'."\n");
-    $r->print('<li '.(($mode eq 'supplemental')?' class="active"':'').'><a href="/adm/supplemental"><b>'.&mt('Supplemental Content').'</b></a></li>');
+    $r->print('<li'.(($mode eq 'navmaps')?' class="active"':'').'><a href="/adm/navmaps"><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'.&mt('Main Content').'&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</b></a></li>'."\n");
+    my $allowed = &Apache::lonnet::allowed('mdc',$env{'request.course.id'});
+    my ($suppcount,$errors);
+    unless ($allowed) {
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'}; 
+        ($suppcount,$errors) = &Apache::lonnet::get_numsuppfiles($cnum,$cdom);
+    }
+    if ($allowed || $suppcount) { 
+        $r->print('<li '.(($mode eq 'supplemental')?' class="active"':'').'><a href="/adm/supplemental"><b>'.&mt('Supplemental Content').'</b></a></li>');
+    }
     $r->print('<li'.(($mode eq 'coursesearch')?' class="active"':'').'><a href="/adm/searchcourse"><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'.&mt('Content Search').'&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</b></a></li>'."\n");
     $r->print('<li'.(($mode eq 'courseindex')?' class="active"':'').'><a href="/adm/indexcourse"><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;'.&mt('Content Index').'&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</b></a></li>'."\n");
     $r->print("\n".'</ul>'."\n");