--- loncom/homework/imageresponse.pm	2004/12/08 01:00:41	1.58
+++ loncom/homework/imageresponse.pm	2005/01/31 23:09:55	1.61
@@ -2,7 +2,7 @@
 # The LearningOnline Network with CAPA
 # image click response style
 #
-# $Id: imageresponse.pm,v 1.58 2004/12/08 01:00:41 albertel Exp $
+# $Id: imageresponse.pm,v 1.61 2005/01/31 23:09:55 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -270,10 +270,14 @@ sub gradefoils {
 	    $temp++;
 	}
     }
+    my $responsestr="$x:$y";
+    my $part=$Apache::inputtags::part;
+    my %previous=&Apache::response::check_for_previous($responsestr,$part,$id);
     if ($result 
 	&& $Apache::lonhomework::type eq 'survey') { $result='SUBMITTED'; }
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.submission"}="$x:$y";
-    $Apache::lonhomework::results{"resource.$Apache::inputtags::part.$id.awarddetail"}=$result;
+    &Apache::response::handle_previous(\%previous,$result);
+    $Apache::lonhomework::results{"resource.$part.$id.submission"}=$responsestr;
+    $Apache::lonhomework::results{"resource.$part.$id.awarddetail"}=$result;
     return '';
 }
 
@@ -340,7 +344,10 @@ sub start_foil {
     if ($target eq 'web' || $target eq 'grade' || $target eq 'tex' ||
 	$target eq 'analyze') {
 	my $name = &Apache::lonxml::get_param('name',$parstack,$safeeval);
-	if ($name eq '') { $name=$Apache::lonxml::curdepth; }
+	if (!$name) {
+	    &Apache::lonxml::error("Foils without names exist. This can cause problems to malfunction.");
+	    $name=$Apache::lonxml::curdepth;
+	}
 	if (defined($Apache::response::foilnames{$name})) {
 	    &Apache::lonxml::error(&mt("Foil name <b><tt>[_1]</tt></b> appears more than once. Foil names need to be unique.",$name));
 	}