Trying to read on-line manuals

[300holst]

For awhile I was able to read the following on-line manuals:

http://skinnerbox.steaky.org/Service/W124/Main.html

and,

http://mb.braingears.com/

Now when I try to look up something on either of these, the site loads ok and I can follow through the manual until I get to the final page. Then I get a blank page with a tiny rectangle in the upper left corner which has three very small colored shapes in it. For example, when I try to look at the electrical diagrams on Braingears, the blank page comes up at the point where I should be seeing a diagram or perhaps a list of diagrams.

What I am asking is whether these sites are not working right or do I have something set wrong in my computer? Other web sites seem to be ok. I am using XP, Norton Antivirus, ZoneAlarm firewall, SpyBot Search and Destroy, and AdAware. (I'm a bit paranoid)

Thanks for any help for this somewhat computer-challenged senior citizen.