Validar Campos de texto con Var Array en flash

on (release) {
if (radioGroup.selection.data==null) {
return;
}
var fields:Array = new Array();
fields["nom"] = nom.text;
fields["ape"] = ape.text;
fields["email"] = email.text;
fields["tel"] = tel.text;
fields["dir1"] = dir1.text;
fields["dir2"] = dir2.text;
fields["est"] = est.text;
fields["ciu"] = ciu.text;
fields["cp"] = cp.text;
fields["pais"] = pais.getValue();
fields["fec_ent"] = fec.text;
fields["hora_ent"] = hora.getValue();
fields["dir_ent"] = dir.text;
fields["dis_ent"] = dis.getValue();
fields["ref_ent"] = ref.text;
fields["tel_ent"] = tel_ent.text;
fields["to_ent"] = to.text;
fields["msg_ent"] = msg.text;
fields["fac"] = fac.label;
fields["pag"] = radioGroup.selection.data;