--- loncom/homework/optionresponse.pm	2010/02/05 20:54:33	1.160
+++ loncom/homework/optionresponse.pm	2010/02/05 21:38:41	1.161
@@ -1,7 +1,7 @@
 # LearningOnline Network with CAPA
 # option list style responses
 #
-# $Id: optionresponse.pm,v 1.160 2010/02/05 20:54:33 www Exp $
+# $Id: optionresponse.pm,v 1.161 2010/02/05 21:38:41 www Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -190,13 +190,14 @@ sub end_foilgroup {
 
     my $TeXlayout=&Apache::lonxml::get_param('TeXlayout',$parstack,$safeeval,
 					     -2,0);
+    my $checkboxvalue=&Apache::lonxml::get_param('checkboxvalue',$parstack,$safeeval);
     if ($target eq 'tex' && $tex_option_switch eq 'nochoice') {@opt=();}
     &Apache::lonxml::debug("Options are $#opt");
     my $max = &Apache::lonxml::get_param('max',$parstack,$safeeval,'-2');
     my $randomize = &Apache::lonxml::get_param('randomize',$parstack,
 					       $safeeval,'-2');
     if ($target eq 'web' || $target eq 'tex') {
-      $result.=&displayfoils($target,$max,$randomize,$TeXlayout,@opt);
+      $result.=&displayfoils($target,$max,$randomize,$TeXlayout,$checkboxvalue,@opt);
       $Apache::lonxml::post_evaluate=0;
     } elsif ( $target eq 'answer') {
       $result.=&displayanswers($max,$randomize,@opt);
@@ -360,8 +361,12 @@ sub displayanswers {
 }
 
 sub check_box_opt {
-# Check if we are in checkbox mode. If so, return "checked" value
-    return '';
+    my ($target,$checkboxvalue,@opt)=@_;
+# Check if we are in checkbox mode: checkboxvalue specified, on web, only two options.
+# If so, return "checked" value
+    if ($#opt!=1) { return ''; }
+    if ($target ne 'web') { return ''; }
+    return $checkboxvalue;
 }
 
 sub check_for_invalid {
@@ -386,7 +391,7 @@ sub check_for_invalid {
 }
 
 sub displayfoils {
-  my ($target,$max,$randomize,$TeXlayout,@opt)=@_;
+  my ($target,$max,$randomize,$TeXlayout,$checkboxvalue,@opt)=@_;
   if (!defined(@{ $Apache::response::foilgroup{'names'} })) {return;}
   my @names = @{ $Apache::response::foilgroup{'names'} };
   my @truelist;
@@ -432,7 +437,7 @@ sub displayfoils {
     my $temp=1;
     my %lastresponse=&Apache::lonnet::str2hash($Apache::lonhomework::history{"resource.$part.$id.submission"});
     my $internal_counter=$Apache::lonxml::counter;
-    my $checkboxopt=&check_box_opt();
+    my $checkboxopt=&check_box_opt($target,$checkboxvalue,@opt);
     if ($checkboxopt) {
        $result.='<br />'.&mt('Choices: ').'<b>'.$opt[0].','.$opt[1].'</b>. '.
                 &mt('Select all that are <b>[_1]</b>.',$checkboxopt);