--- loncom/interface/lonhelp.pm	2003/02/25 22:50:11	1.5
+++ loncom/interface/lonhelp.pm	2003/07/15 18:50:43	1.6
@@ -132,17 +132,26 @@ sub handler
      my $docroot = $r->dir_config('lonDocRoot');
      my $serverroot = $ENV{'HTTP_HOST'};
 
-     my $filename = substr ($ENV{'REQUEST_URI'} , 
+     my $filenames = substr ($ENV{'REQUEST_URI'} , 
 			    rindex($ENV{'REQUEST_URI'}, '/') + 1, -4);
      
      # Security check on the file; the whole filename must consist
      # of nothing but alphanums, ' ,, or ., or the file
      # will be "not found", no matter what.
      
-     return HTTP_NOT_FOUND if ($filename !~ /\A[-0-9a-zA-z_'',.]+\Z/);
+     return HTTP_NOT_FOUND if ($filenames !~ /\A[-0-9a-zA-z_'',.]+\Z/);
 
-     (my $file = Apache::File->new($docroot . "/adm/help/tex/".$filename.'.tex'))
-	 or return HTTP_NOT_FOUND;
+     # Join together the tex files, return HTTP_NOT_FOUND if any of
+     # them are not found
+     my $tex = '';
+     my @files = split(/,/, $filenames);
+     
+     for my $filename (@files) {
+	 (my $file = Apache::File->new($docroot
+			   . '/adm/help/tex/'.$filename.'.tex'))
+	     or return HTTP_NOT_FOUND;
+	 $tex .= join('', <$file>);
+     }
 
      # get me my environment if it exists
      &Apache::lonacc::handler($r);
@@ -165,7 +174,6 @@ sub handler
 	 }
      }
 
-     my $tex = join('', <$file>);
      $tex = render($tex, $docroot, $serverroot);
      serveTex($tex, $r);