--- loncom/interface/lonnavdisplay.pm	2014/05/03 15:22:02	1.26
+++ loncom/interface/lonnavdisplay.pm	2015/03/01 20:42:08	1.29
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
-# Navigate Maps Handler
+# Navigate Maps Display Handler
 #
-# $Id: lonnavdisplay.pm,v 1.26 2014/05/03 15:22:02 raeburn Exp $
+# $Id: lonnavdisplay.pm,v 1.29 2015/03/01 20:42:08 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -30,7 +30,7 @@
 package Apache::lonnavdisplay;
 
 use strict;
-use Apache::Constants qw(:common :http);
+use Apache::Constants qw(:common :http REDIRECT);
 use Apache::lonmenu();
 use Apache::loncommon();
 use Apache::lonnavmaps();
@@ -38,7 +38,6 @@ use Apache::lonhtmlcommon();
 use Apache::lonnet;
 use Apache::lonlocal;
 use Apache::londocs();
-#use Time::HiRes qw( gettimeofday tv_interval );
 
 sub handler {
     my $r = shift;
@@ -47,7 +46,6 @@ sub handler {
 
 sub real_handler {
     my $r = shift;
-    #my $t0=[&gettimeofday()];
     # Handle header-only request
     if ($r->header_only) {
         if ($env{'browser.mathml'}) {
@@ -59,6 +57,16 @@ sub real_handler {
         return OK;
     }
 
+    # Check for critical messages and redirect if present.  
+    my ($redirect,$url) = &Apache::loncommon::critical_redirect(300);
+    if ($redirect) {
+        &Apache::loncommon::content_type($r,'text/html');
+        $r->header_out(Location => $url);
+        return REDIRECT;
+    }
+
+
+
     # Send header, don't cache this page
     if ($env{'browser.mathml'}) {
         &Apache::loncommon::content_type($r,'text/xml');
@@ -283,8 +291,6 @@ sub real_handler {
             $r->print("<p><span class=\"LC_info\">".&mt("This course is empty.")."</span></p>");
         }
     }
-    #my $td=&tv_interval($t0);
-    #$r->print("<br />$td");
     &endContentScreen($r);
     $r->print(&Apache::loncommon::end_page());
     $r->rflush();