Ah now my turn to apologise, I copied selected bits of the original articles - so the end product was mine. I have to admit somehow my grammar goes downhill when I type emails and responses to bulletin boards. Give me a fountain pen and my writing skills and spelling come back to me. Colin -- cdb, bodgy1@optusnet.com.au on 10/01/2003 I have always been a few Dendrites short of an Axon and believe me it shows. Light travels faster than sound. That's why some people appear bright until they speak! -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.