prova una cosa così:
codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
<title>layer</title>
<style type="text/css">
<!--
#layer1 {
position:absolute;
left:100px;
top:100px;
width:200px;
height:200px;
background-color:#FF0000;
color:#FFFFFF;
z-index:1;
}
#layer2 {
position:absolute;
left:150px;
top:150px;
width:200px;
height:200px;
background-color: #00CC00;
color:#FFFFFF;
z-index:2;
}
-->
</style>
</head>
<body>
<div id="layer1">Contenuto layer 1</div>
<div id="layer2">Contenuto layer 2</div>
</body>
</html>
ciak