<form name="salva" method="post">
....
<input type="button" value="salva" onclick="this.form.action='salva.php'; this.form.submit();" />
<input type="button" value="cancella" onclick="this.form.action='delete.php'; this.form.submit();" />
</form>
<form name="salva" method="post">
....
<input type="button" value="salva" onclick="this.form.action='salva.php'; this.form.submit();" />
<input type="button" value="cancella" onclick="this.form.action='delete.php'; this.form.submit();" />
</form>