Вывод переменных ajax

function regadd()
{
    var ajax = new dle_ajax();
ShowLoading('');
var login_name = ajax.encodeVAR( document.getElementById('login_name').value );
var login_password = ajax.encodeVAR( document.getElementById('login_password').value );
var varsString = "login_name=" + login_name;
var varsString = "login_password=" + login_password;

ajax.setVar("action", "login");
ajax.setVar("login", "submit");

ajax.requestFile = dle_root + "engine/ajax/logon.php";
    ajax.method = 'POST';
ajax.onloading = whenLoading;
    ajax.element = 'logons';
    ajax.sendAJAX(varsString);
HideLoading('');
    return false;
};

<form method="post" id="logon" action="">
.............
<input name="login" type="hidden" id="login" value="submit" />
    </form>