Help with overlay (div) codes

[Scotty33]

Hey, im trying to figure out something where on a website like myspace or xanga where you can make a site and put it as an overlay over the layer below it.

I found this code that kinda works

<div class="content" style="position: absolute; left:000px;  top:000px; width:000px; height:100%; overflow: visible;"><center>
lalalalala this is your content!
</div>

however i cant get it to hide the layer beneith it.
Anybody able to help me?
Thanks,
Scott

[Wickham]

Layers are described here:
http://www.echoecho.com/csslayers.htm
Also similar things
http://www.exclipy.com/css/imageoverlay/
and
http://tagsoup.com/-dev/null-/css/fixed/ - scroll and watch left image.