yo estoy construyendo esto en vertical:
esta en construcción y te he simplificado cosas, pero puede darte una idea
<html>
<head>
<style>
.celda1 {
background-color:#000084;
color: #FFFFFF;
font-family: Arial, Helvetica, sans-serif;
font-size: 14px;
}
.celda2 {
color: #000000;
font-family: Arial, Helvetica, sans-serif;
font-size: 14px;
}
</style>
<title>Untitled Document</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<script language="JavaScript">
<!--
function fwLoadMenus(destino) {
if (window.fw_menu_0) return;
window.fw_menu_0 = new Menu("root",150,14,"Verdana, Arial, Helvetica, sans-serif",12,"#000000","#ffffff","#cccccc","#000084") ;
fw_menu_0.addMenuItem("<%=(Centros.Fields.Item("De nominacion").Value)%>" ,"location='" + destino + "?Centro=<%=(Centros.Fields.Item("Denominacion").V alue)%>'");
// anyade las lineas q quieras al submenu
// anayade los submenus q quieras.
<%
Centros.MoveNext()
Wend
If (Centros.CursorType > 0) Then
Centros.MoveFirst
Else
Centros.Requery
End If
%>
fw_menu_0.hideOnMouseOut=true;
fw_menu_0.writeMenus();
} // fwLoadMenus()
//-->
</script>
<script language="JavaScript1.2" src="fw_menu.js"></script>
</head>
<body>
<hr>
<script language="JavaScript1.2">
var Destino
</script>
<table width="95" border="1" cellpadding="0" cellspacing="0" bgcolor="#CCCCCC">
<tr>
<tr>
<td class="celda2"
onMouseOver="window.FW_showMenu(window.fw_menu_0,1 00,10); this.className='celda1'" onMouseOut="FW_startTimeout();this.className='celd a2'" ><b> :: Historia</b></td>
</tr>
<tr>
<td class="celda2" onMouseOver="window.FW_showMenu(window.fw_
menu_1 ,100,20);this.className='celda1'" onMouseOut="FW_startTimeout();this.className='celd a2'" ><b> :: Historia</b></td>
</tr>
<tr>
<td class="celda2" onMouseOver="window.FW_showMenu(window.fw_menu_2,1 00,30);this.className='celda1'" onMouseOut="FW_startTimeout();this.className='celd a2'" ><b> :: Historia</b></td>
</tr>
<tr>
<td class="celda2" onMouseOver="window.FW_showMenu(window.fw_menu_3,1 00,40);this.className='celda1'" onMouseOut="FW_startTimeout();this.className='celd a2'" ><b> :: Historia</b></td>
</tr>
</table>
<p>
<script language="JavaScript1.2">
fwLoadMenus();
</script>
</p>
</body>
</html>