And sorry, Bullfrog, for implying that "you" weren't you! It's just that Trevor in all his postings is totally straightforward and I don't believe he has ever, as most of us haven't, used another name or someone else's name to post an answer. There are some sad little people out there who seem to enjoy criticising and creating mischief (for want of a better word) but never seem to even attempt to answer a query, I wonder why? I really don't see what pleasure they get from doing it.