yo creo que el error estará tanto en el "topframe" como en el "bottomframe"....os paso parte del codigo del bottom frame...a ver si veis algo, puede ser en el evento onload??
......
Código HTML:
<body onload="MM_preloadImages('images/bot-clientes-over.gif','images/bot-ordenes-over.gif','images/bot-operaciones-over.gif','images/bot-trabext-over.gif','images/bot-provee-over.gif','images/bot-pedidos-over.gif','images/bot-disconf-over.gif','images/bot-historial-over.gif','images/bot-back-over.gif','images/bot-inicio-over.gif')">
<table width="100%" height="44" border="0" cellpadding="0" cellspacing="0" background="http://www.forosdelweb.com/images/fondo-pie.gif">
<tr>
<td align="center" valign="bottom"><table width="590" border="0" cellspacing="0" cellpadding="0">
<tr>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="inicio.php" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-inicio.gif" alt="INICIO" width="34" height="19" border="0" id="Image10" onmouseover="MM_swapImage('Image10','','images/bot-inicio-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="clientes.php" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-clientes.gif" alt="CLIENTES" name="Image1" width="49" height="19" border="0" id="Image1" onmouseover="MM_swapImage('Image1','','images/bot-clientes-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="ordenes.php" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-ordenes.gif" alt="ÓRDENES" name="Image2" width="52" height="19" border="0" id="Image2" onmouseover="MM_swapImage('Image2','','images/bot-ordenes-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="ordenes.php?Historial=fact" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-operaciones.gif" alt="PEND FACTURAR" name="Image3" width="72" height="19" border="0" id="Image3" onmouseover="MM_swapImage('Image3','','images/bot-operaciones-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="trabajos_externos.php" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-trabext.gif" alt="TRABAJOS EXTERNOS" name="Image4" width="97" height="19" border="0" id="Image4" onmouseover="MM_swapImage('Image4','','images/bot-trabext-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="proveedores.php" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-provee.gif" alt="PROVEEDORES" name="Image5" width="72" height="19" border="0" id="Image5" onmouseover="MM_swapImage('Image5','','images/bot-provee-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="pedidos.php" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-pedidos.gif" alt="PEDIDOS" name="Image6" width="48" height="19" border="0" id="Image6" onmouseover="MM_swapImage('Image6','','images/bot-pedidos-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="disconformidades.php" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-disconf.gif" alt="DISCONF." name="Image7" width="50" height="19" border="0" id="Image7" onmouseover="MM_swapImage('Image7','','images/bot-disconf-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="ordenes.php?Historial=si" target="mainFrame"><img src="http://www.forosdelweb.com/images/bot-historial.gif" alt="HISTORIAL" name="Image8" width="49" height="19" border="0" id="Image8" onmouseover="MM_swapImage('Image8','','images/bot-historial-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
<td><a href="./BACKUP/backup.php" target='_BLANCK'><img src="http://www.forosdelweb.com/images/bot-back.gif" alt="BACKUP" name="Image9" width="45" height="19" border="0" id="Image9" onmouseover="MM_swapImage('Image9','','images/bot-back-over.gif',1)" onmouseout="MM_swapImgRestore()" /></a></td>
<td width="2" bgcolor="#FFFFFF"><img src="http://www.forosdelweb.com/images/spacer.gif" width="2" height="19" /></td>
</tr>
</table></td>
</tr>
<tr>
<td height="25" align="right" valign="bottom"><img src="http://www.forosdelweb.com/images/img-pie.gif" alt="DIGITAL IMPRESIÓN" width="160" height="25" /></td>
</tr>
</table>
</body>