hai ragione... scusa è la parte html :
codice:
<FORM name="FRM" action="form_check.php" method="post">

<h1 align=center>JavaScript date selector</h1>







<table align="center">

<tr>

<td>

<SCRIPT>fill_select(document.FRM);year_install(document.FRM)</script></td>


</tr></table>

<input type="submit" name="submit" value="invia" />

</FORM>