How do you center block elements,

margin-left:auto and margin-right:auto

should work but it doesnt.

You need to specify a width, otherwise it will just assume full width:

<div style="margin:  0px auto;  width:  760px;  text-align:  center;">
...
</div>

The text-align: center is for IE 5.5 and earlier. Make sure you counter that in your nested block elements with a text-align: left.

You'll also notice the syntax I used. When two values are put after margin: , the first value applies to top/bottom and the second to left/right.

that didnt work, i made the width 100% because I want it the be centered for the whole page.

That's precisely WHY it won't work. margin: 0px auto; will only fill in the remaining left and right margins AFTER the width of the div has been calculated.

If your div width is 100%, then there's no more margin to fill on either side since your div is filling up the whole page anyway.

In other words, you need to specify a div width that isn't 100%. The syntax does work and work well (see these sites for two working examples: http://www.lightenupontario.ca and http://www.greenbuildingfest.com ). If you want your div to span the width of the page AND be centered...that's simply not going to work.

In other words, you need to rethink your math.

Ok, I didnt understand what exactly margin: 0px auto; did at first but now I get it, that makes sense.

Thanks

No probs, dude. Good luck to you!