--- loncom/interface/coursecatalog.pm	2009/02/07 18:15:44	1.46
+++ loncom/interface/coursecatalog.pm	2009/03/18 21:03:25	1.48.2.1
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler for displaying the course catalog interface
 #
-# $Id: coursecatalog.pm,v 1.46 2009/02/07 18:15:44 raeburn Exp $
+# $Id: coursecatalog.pm,v 1.48.2.1 2009/03/18 21:03:25 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -123,11 +123,16 @@ ENDSCRIPT
             }
         } else {
             my (%add_entries);
+            my ($currdepth,$deeper) = &get_depth_values();
             if ($selitem) {
+                my $alert = &mt('Choose a subcategory to display');
+                if (!$deeper) {
+                    $alert = &mt('Choose a category to display');
+                }
                 $catjs .= <<ENDJS;
 function check_selected() {
     if (document.coursecats.$selitem.options[document.coursecats.$selitem.selectedIndex].value == "") {
-        alert('Choose a subcategory to display');
+        alert('$alert');
         return false;
     }
 }
@@ -139,7 +144,6 @@ ENDJS
                 $r->print('<form name="'.$formname.
                           '" method="post" action="/adm/coursecatalog">'.
                           &additional_filters($codedom,$has_subcats)."\n");
-                my ($currdepth,$deeper) = &get_depth_values();
                 $r->print('<input type="hidden" name="catalog_maxdepth" value="'.
                           $deeper.'" />'."\n");
                 for (my $i=0; $i<$deeper; $i++) {
@@ -398,12 +402,19 @@ sub cat_header {
           text=>"Select courses"});
         $r->print(&Apache::lonhtmlcommon::breadcrumbs('Select courses'));
     }
+    my $onchange;
+    unless (($env{'browser.interface'} eq 'textual') || ($env{'form.interface'} eq 'textual')) {
+        $onchange = 1;
+    }
     $r->print('<form name="coursecatdom" method="post" action="/adm/coursecatalog">'.
               '<table border="0"><tr><td><b>'.&mt('Domain:').'</b></td><td>'.
-              &Apache::loncommon::select_dom_form($codedom,'showdom','',1).
-	      '&nbsp;<input type="submit" name="godom" value="'.&mt('Change').'" /></td></tr></table></form>'.
+              &Apache::loncommon::select_dom_form($codedom,'showdom','',1,$onchange));
+    if (!$onchange) {
+	   $r->print('&nbsp;<input type="submit" name="godom" value="'.&mt('Change').'" />');
+    }
+    $r->print('</td></tr></table></form>'.
 	      '<form name="coursecats" method="post" action="/adm/coursecatalog"'.
-              ' onsubmit="check_selected()">'.
+              ' onsubmit="return check_selected();">'.
               '<table border="0"><tr>'.$catlinks.'</tr></table></form>');
     return;
 }