Gerry, you're not dumb at all! If you means the lines on the page where you're reading all the messages in a thread I think that's just to make it more attractive. I really don't think the colors serve any other purpose.
And you should never worry about us thinking you're stupid, Gerry... you know the kind of things we share on this board.
Whoops! I thought I had read this whole thread and I had only read the first page. Your question was already answered!!
-------------------- "Anyone can exercise, but this kind of lethargy takes real discipline." -Garfield