codice:
<SCRIPT> 
function longu(combo) {
if (combo.options[combo.selectedIndex].value!="null") { 
location.reload();
} 
} 
</SCRIPT> 
<select name="nome" id="select" onchange="longu(this)"> 
<OPTION selected value=null>Aggiorna?</OPTION> 
<OPTION value="eja">SI</OPTION> 
<OPTION value="null">NO</OPTION>
</select>