Mannaggia a explorer.
Sto facendo il primo esperimento di css..
Qesto il codice, funziona tutto bene (Safari) tranne su explorer su pc che mi mette la barra superiore spostata a dx lasciando uno spazione bianco, explorer su mac invece non continua la barra nera, come faccio???:

<!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>
<title>Layout a due colonne liquido</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
<style type="text/css">


body {
margin:0px;
padding:0px;
font-family:verdana, arial, helvetica, sans-serif;
color:#333;
background-color:white;
height: 100%;
width: 600px;
}

a:link{color: #FFFFFF; font-size: 10px; font-family: Verdana; text-decoration: none}
a:active{color: #666666; font-size: 10px; font-family: Verdana; text-decoration: none}
a:hover {color: #FF9900; font-size: 10px; font-family: Verdana; text-decoration: none}
a:visited{color: #FFFFFF; font-size: 10px; font-family: Verdana; text-decoration: none}

h1 {
margin:10px 10px 15px 10px;
padding:0px;
font-size:28px;
line-height:28px;
font-weight:900;
color:#000066;
}


p {
font:12px verdana, arial, helvetica, sans-serif;
margin:10px 10px 16px 10px;
padding:0px;
color:#FFFFFF
}


#testata {
position:absolute;
margin:0px;
padding:0px;
height:81px;
width:100%;
background-color:#000000;
}


#menu {
position:absolute;
top:80px;
left:0px;
width:100px;
background-color:#000000;
height: 100%;
}

#contenuto {
margin:0px 0px 0px 180px;
padding:10px;
background-color: #FFFFFF;
}
</style>
</head>

<body>

<div id="testata">
<object classid="clsid27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,29,0" width="602" height="80" widht="760">
<param name="movie" value="menu_alto.swf">
<param name="quality" value="high">
<embed src="menu_alto.swf" width="602" height="80" quality="high" pluginspage="http://www.macromedia.com/go/getflashplayer" type="apllication/x-shockwave-flash" widht="760"></embed></object>
</div>
<div id="menu">
<?php
mysql_connect("localhost", "xxx", "xxx") or die ("connessione fallita!");
mysql_select_db("xxxx") or die ("selezione del BD fallita!");
$query = mysql_query("SELECT categoria FROM categoria ORDER BY ordinamento");
while($result = mysql_fetch_array($query)) {
echo"

<a href =index.php?categoria=". $result['categoria']. ">". $result['categoria'] . "</a></p>";}
?>

</div>
<div id="contenuto">
<h1>Codice</h1>


.......</p>
</div>
</body>
</html>