To all of you who have contributed to this thread, my hearty thanks! Not only have you answered my question (with the answer I hoped for); you also opened some areas of enquiry I had overlooked. Thank you! Frank Frank Morgret 15 Towering Hts -- #1206 St Catharines, Ontario CANADA L2T 3G7 [log in to unmask] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%