[css-d] Mysterious offset in 3-column layout

I find a mysterious offset of 10 px in my 3-column layout, my first such layout. I have validated the HTML and the CSS. I used Firebug for another perspective. My column 1 header 2 has a mysterious offset of 10. I do not know where it comes from. http://www-rohan.sdsu.edu/~nmisiasz/test/pag

[css-d] CSS element interferes with image map in FF?

Could a CSS-positioned element interfere with an image map? I am updating a site re-using some elements. I added In the right-hand corner, the small blue text "navigation bar" (Home | Links | Contact us) which is positioned with CSS. http://www-rohan.sdsu.edu/~nmisiasz/CLAS/index.html Now, mu

[css-d] Horizontal Menu problems

I am new to a lot of CSS. I have been trying to get a horizontal menu to position. I have looked through the archives and found an List Apart example that I could duplicate in isolation: http://www-rohan.sdsu.edu/~nmisiasz/test/ListApart2.html I then tried to position the menu with my other e

[css-d] Horizontal Menu problems solved

I received some excellent advice. Yes, my CSS was being superseded. I had used Firebug but for some reason that did not show up in Firebug for me. Another suggestion was to simplify both my HTML and my CSS. I had divs within divs for no good reason except that, as a beginner, I was copying