hola realize este ejemplo rapido para que me entiendan el problema como les comentaba es de que al cambiar una resolucion mas alta me cambia de posicion el menu.
Código HTML:
<html>
<head>
<meta http-equiv="Content-Language" content="es-mx">
<meta http-equiv="Content-Type" content="text/html; charset=windows-1252">
<title>UNO</title>
</head>
<body>
<table border="1" width="100%" height="103">
<tr>
<td> </td>
</tr>
<tr>
<td>
<table border="1" cellpadding="0" cellspacing="0" width="100%" height="110%" bgcolor="#FF7200">
<tr>
<td width="109" align="center">
<p align="right"><font color="#F8FAFC"><span style="font-size: 9pt"><b>
UNO</b></span></font></td>
<td width="6" align="center"><b> <font color="#F8FAFC" style="font-size: 9pt">
|</font></b></td>
<td width="126" align="center" onmouseover="document.getElementById('capa1').style.visibility='visible' ;this.style.cursor='hand';" onmouseout="document.getElementById('capa1').style.visibility='hidden' ;this.style.cursor='hand';" ><p align="center">
<b> <font color="#F8FAFC" style="font-size: 9pt">
DOS </font></b></p></td>
<td width="6" align="center" onmouseover="document.getElementById('capa1').style.visibility='visible' ;this.style.cursor='hand';" onmouseout="document.getElementById('capa1').style.visibility='hidden' ;this.style.cursor='hand';" ><b> <font color="#F8FAFC" style="font-size: 9pt">
|</font></b></td>
<td width="133" align="center" onmouseover="document.getElementById('capa2').style.visibility='visible' ;this.style.cursor='hand';" onmouseout="document.getElementById('capa2').style.visibility='hidden' ;this.style.cursor='hand';" ><p align="center">
<font color="#F8FAFC"><span style="font-size: 9pt"><b>TRES</b></span></font></p></td>
<td width="6" align="center" onmouseover="document.getElementById('capa2').style.visibility='visible' ;this.style.cursor='hand';" onmouseout="document.getElementById('capa2').style.visibility='hidden' ;this.style.cursor='hand';" ><b> <font color="#F8FAFC" style="font-size: 9pt">
|</font></b></td>
<td width="135" align="center" onmouseover="document.getElementById('capa3').style.visibility='visible' ;this.style.cursor='hand';" onmouseout="document.getElementById('capa3').style.visibility='hidden' ;this.style.cursor='hand';" ><p align="center">
<font color="#F8FAFC"><span style="font-size: 9pt"><b>CUATRO</b></span></font></p></td>
<td width="6" align="center" onmouseover="document.getElementById('capa3').style.visibility='visible' ;this.style.cursor='hand';" onmouseout="document.getElementById('capa3').style.visibility='hidden' ;this.style.cursor='hand';" ><b> <font color="#F8FAFC" style="font-size: 9pt">
|</font></b></td>
<td width="127" align="center"><p align="center"><font color="#F8FAFC">
<span style="font-size: 9pt"><b>CINCO</b></span></font></p></td>
<td width="6" align="center"><p align="center"><b> <font color="#F8FAFC" style="font-size: 9pt">
|</font></b></p></td>
<td width="125" align="center"><p align="center"><b> <font color="#F8FAFC" style="font-size: 9pt">
</font></b><font color="#F8FAFC"><span style="font-size: 9pt"><b>SEIS</b></span></font></p></td>
<td width="6" align="center"><p align="center"><b> <font color="#F8FAFC" style="font-size: 9pt">
|</font></b></p></td>
<td width="127" align="center"><p align="left"><font color="#F8FAFC">
<span style="font-size: 9pt"><b>SIETE</b></span></font></p></td>
</tr>
</table></td>
</tr>
</table>
<div style="position: absolute; width: 138px; left: 135px; z-index:211; top:89px; float:right; visibility:hidden" id="capa1" onMouseOver="document.getElementById('capa1').style.visibility='visible' ;this.style.cursor='hand';" onMouseOut="document.getElementById('capa1').style.visibility='hidden' ;this.style.cursor='hand';">
<table border="0" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td> </td>
</tr>
</table>
<table border="1" width="139" cellspacing="0" cellpadding="0" bordercolor="#FFFFFF">
<tr>
<td align="center" style="background:#FF7200; opacity:.7; filter:alpha(opacity=80)" onMouseOver="this.style.backgroundColor='#3366CC';this.style.cursor='hand';" onMouseOut="this.style.backgroundColor='#FF7200';">
<font size="1" color="#FFF9F4"><b>UNO</b></font></td>
</tr>
<tr>
<td align="center" style="background:#FF7200; opacity:.7; filter:alpha(opacity=80)"onMouseOver="this.style.backgroundColor='#3366CC';this.style.cursor='hand';" onMouseOut="this.style.backgroundColor='#FF7200';">
<font size="1" color="#FFFFFF"><b>DOS</b></font></td>
</tr>
</table>
</div>
<div style="position: absolute; width: 147px; left: 275px; top: 90px; z-index:203; height:68px; visibility:hidden" id="capa2" onMouseOver="document.getElementById('capa2').style.visibility='visible' ;this.style.cursor='hand';" onMouseOut="document.getElementById('capa2').style.visibility='hidden' ;this.style.cursor='hand';" >
<table border="0" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td> </td>
</tr>
</table>
<table border="1" width="146" cellspacing="0" cellpadding="0" bordercolor="#FFFFFF">
<tr>
<td align="center" style="background:#FF7200; opacity:.7; filter:alpha(opacity=80)" onMouseOver="this.style.backgroundColor='#3366CC';this.style.cursor='hand';" onMouseOut="this.style.backgroundColor='#FF7200';">
<font size="1" color="#FFF9F4"><b>UNO</b></font></td>
</tr>
<tr>
<td align="center" style="background:#FF7200; opacity:.7; filter:alpha(opacity=100)" onMouseOver="this.style.backgroundColor='#3366CC';this.style.cursor='hand';" onMouseOut="this.style.backgroundColor='#FF7200';">
<font size="1" color="#FFF9F4"><b>DOS</b></font></td>
</tr>
</table>
</div>
<div style="position: absolute; width: 151px; left: 421px; top: 91px; float:left; z-index:205; height:76px; visibility:hidden" id="capa3" onMouseOver="document.getElementById('capa3').style.visibility='visible' ;this.style.cursor='hand';" onMouseOut="document.getElementById('capa3').style.visibility='hidden' ;this.style.cursor='hand';" >
<table border="0" width="100%" cellspacing="0" cellpadding="0">
<tr>
<td> </td>
</tr>
</table>
<table border="1" width="151" cellspacing="0" cellpadding="0" bordercolor="#FFFFFF" bgcolor="#FFFFFF">
<tr>
<td align="center" style="background:#FF7200; opacity:.7; filter:alpha(opacity=80)" onMouseOver="this.style.backgroundColor='#3366CC';this.style.cursor='hand';" onMouseOut="this.style.backgroundColor='#FF7200';">
<font size="1" color="#FFF9F4"><b>UNO</b></font></td>
</tr>
<tr>
<td align="center" style="background:#FF7200; opacity:.7; filter:alpha(opacity=80)" onMouseOver="this.style.backgroundColor='#3366CC';this.style.cursor='hand';" onMouseOut="this.style.backgroundColor='#FF7200';">
<font size="1" color="#FFF9F4"><b>DOS </b>
</font><b><font size="1" color="#FFF9F4"> </font></b></td>
</tr>
</table>
</div>
</body>
</html>