Question

I have php generating html and I want to create layers. Basically I want to have a menu overlay without messing up the structure of everything displayed under it.

Answer 1

Try this:

CSS:

#menuOverlay {
   position:fixed; /*or  absolute*/
   top:0;
   left:0;
   width:100%:
   height:30px;
   background:green;
   z-index: 999; /* or  greater value */
}

HTML:

<div id="menuOverlay">
   menu items here ....
</div>