Configuralo a tu gusto...
Cambias colores, urls, etc...
Código HTML:
<script language="JavaScript" type="text/javascript"><!--
function irA(menu){window.location.href = menu.options[menu.selectedIndex].value;}
// fin de javascript -->
</script>
<form name="formulario">
<p><select name="menu" size="1" onchange="irA(this)"
style="BACKGROUND-COLOR: #ffa54a; COLOR: #000080; FONT-FAMILY: Verdana, Arial; FONT-SIZE: 9pt; FONT-WEIGHT: bold">
<option selected value>Visitar</option>
<option value="http://www.forosdelweb.com">FDW</option>
<option value="http://www.simplemachines.org">SMF</option>
<option value="http://forobar.com.ar">Forobar</option>
<option value="http://www.google.com.ar">Google.Ar</option>
<option value="http://#">Tu sitio</option>
</select> </p>
</form>
<SCRIPT language="JavaScript" SRC="/include/frames.js">
</SCRIPT>