red58, I see you left a confused icon, let me see if I can help you understand the concept- Besides being just plain 'ol courtesy, it's Forum etiquette to stick to the original posters topic. That way the poster can get HIS question answered without someone else coming in with an off topic subject, and the thread suddenly takes a sudden left turn. It would be like you and a friend were discussing something and I step in between the two of you and start talking to yer buddy about something totally unrelated. Hope that helps.