Allora:
la pagina testa.asp:
<body>
<div align="center">
<center>
<table width="770" border="0" cellpadding="3" bgcolor="#669ACC" style="border-collapse: collapse" bordercolor="#111111" cellspacing="0">
<tr>
<td>
<p align="center">
[img]asp/immagini/testasito3.jpg[/img]</td>
</tr>
</table>

</center>
</div>

<table width="770" border="0" align="center" cellpadding="1" cellspacing="0">
<tr align="center" bgcolor="#000066">
<td bgcolor="#336799">Link</td>
<td bgcolor="#336799">Link</td>
<td bgcolor="#336799">Link</td>
<td bgcolor="#336799">Link</td>
<td bgcolor="#336799">Link</td>
<td bgcolor="#336799">Link</td>
<td bgcolor="#336799">Link</td>
<td bgcolor="#336799">Link</td>
</tr>
</table>
<div align="center">
<center>
<table width="770" border="0" height="480" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111" cellpadding="0">
<tr>
<td width="125" valign="top" class="bordocella">
</td>
<td valign="top"></center></div>
la pagina sinistra.asp

la pagina stile.css
BODY
{
margin-top:0pt;
margin-left:0pt;
margin-right:0pt;
position:static;
scrollbar-face-color: #006699;
scrollbar-shadow-color: #EEEBBF;
scrollbar-highlight-color: #EEEBBF;
scrollbar-3dlight-color: #006699;
scrollbar-darkshadow-color: #006699;
scrollbar-track-color: #D1E0EF;
scrollbar-arrow-color: #EEEBBF;
background-color: #FFFFFF;
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 8pt;
color: #003399;
}
.campo {
background:#ECFFFF;
font-size: 7pt;
font-family:Verdana, Arial;
color: #000000;
}
.bottone {
background:#000066;
font-size: 7pt;
font-family:Verdana, Arial;
color: #FFFFFF;
}
.bordocella {
text-indent: 0pt;
background-color: #669ACC;
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 9pt;
color: #FFFFFF;
padding: 4px

}
A {
FONT-SIZE: 9pt;
FONT-FAMILY: Verdana, Arial, helvetica, "sans serif";
TEXT-DECORATION: none;
color:white;
font-weight: bold;
padding: 2px;
}
A:visited {
FONT-SIZE:9pt;
FONT-FAMILY:Verdana, Arial, helvetica, "sans serif";
TEXT-DECORATION: none;
color:white;
font-weight: bold;
padding: 2px;
}
A:hover {
FONT-SIZE:9pt;
FONT-FAMILY:Verdana, Arial, helvetica, "sans serif";
TEXT-DECORATION: underline;
background-color: #F4F4FF;
color:#000000;
font-weight: bold;
}

table {
font-family: Arial, Helvetica, sans-serif;
font-size: 9pt;
color: #003399;
}
.bordotesto {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 7pt;
color: #003399;
background-color: #FFFFFF;
border: 1px ridge #003366;
padding: 2px;
}
.titolo {
font-family: Verdana, Arial, Helvetica, sans-serif;
font-size: 10pt;
color: #000066;
background-color: #DEF2F3;
border: none #003366;
padding: 2px;
font-weight: bold;

}
la pagina index.htm

<link rel="stylesheet" type="text/CSS" href="jsmenu.CSS">
<link rel="stylesheet" type="text/CSS" href="menu.CSS">
<script type="text/Javascript" src="expand.js"></script>
<div id="nav">
<ul>[*]Home Page[*]<h3>Linguaggi</h3>
<ul>[*]segnala sito[*]Javascript[*]DOM[*]PHP[/list]
[*]<h3>Software</h3>
<ul>[*]Photoshop[*]Flash[*]Fireworks[*]Dreamweaver[/list]
[*]Home Page[*]<h3>Webdesign</h3>
<ul>[*]Webdesign[*]Accessibilità[*]Usabilità[/list]
[/list]
</div>
la pagina menu.css
div#nav{width:125px;margin-left: 0px;background: #00005A;
border: 1px solid #00005A; font: 11px Arial, Helvetica, sans-serif}

div#nav h3{font-size: 100%;margin:0;padding: 4px 3px;
border-top: 1px solid #FFF;color: #000;background-color: #006699}

div#nav ul, div#nav li{margin: 0;padding: 0;list-style-type: none}

div#nav li{margin: 0 0 1px 0}

/*padding-left è la distanza da sx dei link "a".*/
/* se non è indicato left, right, bottom o top, si intende per tutti e */
/*quattro i lati in senso orario iniziando da sopra. */

div#nav a{display: block;padding-left: 15px;height: 18px;line-height: 18px;
border-top: 1px solid #FFF;background-color: #006699;color: #000;
text-decoration: none;font-weight: bold}

div#nav a:hover{color: #00005A;background-color: #0099FF}

div#nav ul ul a{color: #333; background-color: #D1E0EF;font-weight: normal; font-size: 100%}
ripeto che funziona tutto, ma non so come faccio a mantenere lo stile del menu anche quando lo visualizzo dentro sinistra.asp... Chiaro che sono inesperto. Tant'è che i codici li ho presi dal web e stò cercando di studiarci su...