um, Can I just rewrite it and give you the code instead of explaining it? I have given you an example if you want to do it normally which you can use the in the future but this is a slightly more advanced thing you want...

Hi Nick, that would be brilliant thanks - I'm sure I will learn heaps from seeing how it works. And I'm sorry to have been such a pain, I didn't realise it was more involved than what I first thought.