--- loncom/homework/structuretags.pm	2006/04/28 18:33:10	1.353
+++ loncom/homework/structuretags.pm	2006/05/23 19:05:42	1.355
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.353 2006/04/28 18:33:10 albertel Exp $
+# $Id: structuretags.pm,v 1.355 2006/05/23 19:05:42 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -160,6 +160,14 @@ sub page_start {
 	    $form_tag_start.=&Apache::edit::form_change_detection();
 	}
 	$form_tag_start.='>';
+
+	my $symb=&Apache::lonnet::symbread();
+	if ($symb =~ /\S/) {
+	    $symb=
+		&HTML::Entities::encode(&Apache::lonenc::check_encrypt($symb));
+	    $form_tag_start.=
+		'<input type="hidden" name="symb" value="'.$symb.'" />';
+	}
     }
     return ($page_start,$form_tag_start);
 }
@@ -606,7 +614,8 @@ sub start_problem {
 
     my $name= &get_resource_name($parstack,$safeeval);
     my ($result,$form_tag_start);
-    if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex') {
+    if ($target eq 'web' || $target eq 'webgrade' || $target eq 'tex'
+	|| $target eq 'edit') {
 	($result,$form_tag_start) =
 	    &page_start($target,$token,$tagstack,$parstack,$parser,$safeeval,
 			$name);