Think that Mercia was a bit annoyed that she had answered a question and provided a useful link, but was then ignored, if you look down her earlier post you will find a link to it.............hope this is helpful!.......
Oh well, mercia, all I can add is that I often give answers, and sometimes they are ignored, but hey!.......if that's the way they are, then fine, I will be unlikely to help in the future!...........