This is so that I can avoid having to address lots of elements individually. I tried it, but it says I need to have the " in the brackets of the element name. Is there a trick to doing this, or is it just not possible?
Perhaps I ought to stop answering my own questions
I thought about the problem another way, and found I could use an array to address the elements dynamically instead. It just goes to show, sometimes you can get to the other side faster by going round the mountain rather than over it.
I've attached an example, since it might help someone else.