--- loncom/homework/structuretags.pm	2005/06/28 19:17:36	1.295
+++ loncom/homework/structuretags.pm	2005/06/28 19:56:10	1.296
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA 
 # definition of tags that give a structure to a document
 #
-# $Id: structuretags.pm,v 1.295 2005/06/28 19:17:36 albertel Exp $
+# $Id: structuretags.pm,v 1.296 2005/06/28 19:56:10 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1135,7 +1135,7 @@ sub start_part {
     my ($target,$token,$tagstack,$parstack,$parser,$safeeval)=@_;
     my $result='';
     my $id= &Apache::lonxml::get_param('id',$parstack,$safeeval);
-    if ($id eq '') { $id = $Apache::lonxml::curdepth; }
+    if ($id =~ /^\s*$/) { $id = $Apache::lonxml::curdepth; }
     $Apache::inputtags::part=$id;
     push(@Apache::inputtags::partlist,$id);
     @Apache::inputtags::response=();