Thank you and also to Abigail for all the help on this. I'm starting to get to grips now with some of the more powerful features of this great language. A language which a lot of my old college lecturers said was very dangerous and only gudgingly showed us for CGI scripting, then a very new field. I only wish I'd been using it full time since then, and I might be able to answer more then I ask.
Thanks again