Explorer Issue?

I am in the process of building a website using Dreamweaver. I am having a
problem with the active link images/buttons when previewing them in Explorer.
When I click on the link it's cell is highlighted using the Explorer preference
color. This isn't a problem in other browsers like Safari or Netscape, so it
seems to be an Explorer issue. The cells that contain the links have a border
of "0" with no color selected in my code. I've gone through my preferences in
Explorer and can't seem to find that option to turn it off. I would like to
code the page so that it doesn't happen on other people's browsers who may be
looking at the site in Explorer. I am having a similar problem with a flash
movie that I placed in a cell..the cell's border is highlighting. I'm sure
there's some simple solution to all this, but I'm stumped for the moment. If
anyone has some suggestions or advice, I would sure appreciate it.

Oh, I'm on OS 10.2 on a Mac G5 and my version of Explorer is 5.2.2