--- loncom/homework/functionplotresponse.pm	2011/01/26 20:20:50	1.52
+++ loncom/homework/functionplotresponse.pm	2011/01/28 16:06:49	1.53
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
 # option list style responses
 #
-# $Id: functionplotresponse.pm,v 1.52 2011/01/26 20:20:50 www Exp $
+# $Id: functionplotresponse.pm,v 1.53 2011/01/28 16:06:49 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -536,6 +536,12 @@ sub start_functionplotrule {
                                      $token,'8').
              &Apache::edit::end_row();
   } elsif ($target eq 'modified') {
+    if (($env{'form.'.&Apache::edit::html_element_name('xinitial')} ne '') & ($env{'form.'.&Apache::edit::html_element_name('xinitiallabel')} eq 'start')) {
+       $env{'form.'.&Apache::edit::html_element_name('xinitiallabel')}='';
+    }
+    if (($env{'form.'.&Apache::edit::html_element_name('xfinal')} ne '') & ($env{'form.'.&Apache::edit::html_element_name('xfinallabel')} eq 'end')) {
+       $env{'form.'.&Apache::edit::html_element_name('xfinallabel')}='';
+    }
     my $constructtag=&Apache::edit::get_new_args($token,$parstack,
                                                  $safeeval,'index','derivativeorder',
                                                            'xinitial','xinitiallabel','xfinal','xfinallabel',