Prova 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" lang="it" xml:lang="it">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<title>titolo</title>
<style type="text/css">
body {
margin: 0;
padding: 0;
background-color: #fff;
color: #000;
font-family: Arial, Helvetica, sans-serif;
}
#contenitore {
width: 930px;
margin:0 auto;
}
#sinistro {
width: 217px;
height: 700px;
float: left;
background: url(img/Cherry_blossom.jpg) no-repeat;
}
#centrale {
margin-left:217px;
width: 466px;
height: 540px;
padding-top: 80px;
padding-bottom:80px;
background: url(img/pagina.jpg) no-repeat;
}
#centraleInterno {
width: 350px;
height: 100%;
margin: 0 auto;
overflow:auto;
}
#destro {
width: 247px;
height: 700px;
float: right;
background: url(img/Ronin.jpg) no-repeat;
}
</style>
<!--[if IE 6]>
<style type="text/css">
#contenitore {
width: 936px;
}
</style>
<![endif]-->
</head>
<body>
<div id="contenitore">
<div id="sinistro">Colonna sinistra</div>
<div id="destro">Colonna destra</div>
<div id="centrale">
<div id="centraleInterno">
<h1>CONTENUTO SCORREVOLE</h1>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exercitation ulliam corper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem veleum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel willum lunombro dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.</p>
Lorem ipsum dolor sit amet, consectetuer adipiscing elit, sed diam nonummy nibh euismod tincidunt ut laoreet dolore magna aliquam erat volutpat. Ut wisi enim ad minim veniam, quis nostrud exercitation ulliam corper suscipit lobortis nisl ut aliquip ex ea commodo consequat. Duis autem veleum iriure dolor in hendrerit in vulputate velit esse molestie consequat, vel willum lunombro dolore eu feugiat nulla facilisis at vero eros et accumsan et iusto odio dignissim qui blandit praesent luptatum zzril delenit augue duis dolore te feugait nulla facilisi.</p>
eccetera
</div>
</div>
</div>
</body>
</html>