Thank you all for your suggestions/advice
MJ, I think you are right. When I log in the double lines (brown before, orange now) disappear (as does the moving Dove ad etc.). Haven't seen the blue line you pictured.
Michael if I have a firewall, I haven't changed any settings intentionally. I have only one pop-up blocker & virus check that came with SBC high-speed wireless pkg. I lost the browser awhile ago, & couldn't access the net at all. Got it back though, whew.
I tried downloading Mozilla/firefox, but it wouldn't take (couldn't override? my yahoo browser - or I didn't know how to change the settings). At least my browser's working. That's the most important thing right now. If I run into a major problem again, will think about a new puter. What I have now is, Windows XP v2 high-speed wireless laptop. (I could probably use some more memory & a new battery as well.) I'm up & running, for now.
A BIG Thank You to Ben, as well.
Edited: The script error occured (2x) when I clicked on reload/refresh.