I took a look at this site on an 800x600 resolution monitor and didn't like how the original layout looked. Having the menu box on the left hand side with a 20px margin to the left used up too much screen space. So I decided to move the menu box to the right of the main body of the page.

I could have hard-coded the box position; but decided that I wanted to have the main body remain centered regardless of browser size. That would complicate the positioning of the menu box (which is it's own div not contained with the main page). Once again A List Apart had a good articledescribing how they got their CSS centering to work.

The ALA article had links to these two pages describing the methods I used: Auto Width Marginsand NegativeMargins.

The AgilityNerd site has two main divs: #page for the main body and#sidebar for the box containing the menu. I used the Auto Width Margins method to center the main body:

#page { font-size: 13px; background: white; border: 1px solid black;
top: 0px; width: 640px; margin: 0px auto; margin-bottom: 50px;
text-align: left;}

The two lines of interest are margin: 0px auto;` and ``text-align: left;. Thelater is required because I used the IE 5.x workaround of specifying text-align: center; in the body element.

So now that the main body of the site was centered, I wanted the menu to be floating off to the right of the main body. The Negative Margins method let me horizontally center the divand also offset it horizontally by any amount. I offset it by half the(fixed) width of the main body plus a little space. The additionalspace keeps IE 5.x browser's miscalculation of sizes from causing theborders to not meet correctly:

#sidebar { background: white; font-size: 12px; position: fixed;
width: 140px; height: auto; top: 70px; left: 50%; margin-left:
330px; text-align: center; border: 1px solid black; }

Unlike the article, I used position: fixed instead of absolute. This allows the menubox to float in place during scrolling (but only for CSS compliant browsers like: Mozilla/Netscape).

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