$("input").keyup(function() {
  $.post("../fhphp/updatetree.php",{id: $(this).closest("div").attr("id"), type:
 $(this).attr('name'), value: $(this).val()});
});

if ($mytree!=null) {
    $person=$mytree->findPerson($_POST['id']);
    if ($person!=null) {
        $varFunction="change".$_POST['type'];
        $person->$varFunction(mysqli_real_escape_string($link,$_POST['value']));
    } else {
        $mytree->addPersonNode(new personNode($_POST['id']));
    }
}

$mytree=new treeClass();
$mytree->constructTree($_SESSION['loginusername'],$link);