codice:
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Documento senza titolo</title>
<style type="text/css">
<!--
#header {
clear: both;
width: 100%;
}
#header1 {
background-color: #333;
float: left;
width: 69%;
}
#header2 {
background-color: #FFF;
float: left;
width: 1%;
}
#header3 {
background-color: #F00;
float: left;
width: 30%;
}
#header4 {
clear:both;
}
-->
</style>
</head>
<body>
<div id="header">
<div id="header1"></div>
<div id="header2"></div>
<div id="header3"></div>
<div id="header4"></div>
</div>
</body>
</html>
Ovviamente il background lo puoi sostituire cn delle immagini se vuoi