no me habre la pagina de POST al utilizar popup

[escan_0]

encontre la faq, consegui hacer lo siguiente pero me da error:

<script language=javascript>

function abrirPreview(url,name,prop){
window.open(url,name,prop);
form.target=name;
form.action=url;
form.submit();
}

</script>



<FORM METHOD="POST" ACTION="accion_notas.php" name="form" id="form" onSubmit='return validar();'>
<INPUT name="submit" TYPE="submit" class="normal" value="Finalizar">&nbsp;<INPUT name="button" TYPE="button" class="normal" value="Preview y Continuar" onClick="abrirPreview('popPreview.php?idN={id}','P review','width=620,height=600,toolbar=no,location= no,directories=no,status=no,menubar=no,scrollbars= yes,resizable=yes'); return false;">
</FORM>