// Based on the algorithm used by http://www.braintrust.co.nz/ipv6wwwtest/ and popularized by Wikipedia

var _loopia_dnssectest_done = 0;
var _loopia_dnssectest_goodzone_done = 0;
var _loopia_dnssectest_badzone_done = 0;
var _loopia_dnssectest_timeout = 60000;
var _loopia_dnssectest_timeout_func = false;
var _loopia_dnssectest_resultdiv_id = false;

var badzone_url = "https://www.dnssectest-badzone.se/";
var goodzone_url = "https://www.dnssectest.se/";
 
function _loopia_dnssectest_startTest(_loopia_dnssectest_hiddendiv, _loopia_dnssectest_resultdiv) {
  _loopia_dnssectest_resultdiv_id = _loopia_dnssectest_resultdiv;

  _loopia_dnssectest_hiddendiv = document.getElementById(_loopia_dnssectest_hiddendiv);

  _loopia_dnssectest_hidden_images = '<img height="1" width="1" src="' + goodzone_url + 'empty_goodzone.gif" id="_loopia_dnssectest_goodzone_img" onload="_loopia_dnssectest_goodzone_done = 1; _loopia_dnssectest_checkFinished();" onerror="_loopia_dnssectest_goodzone_done = 2; _loopia_dnssectest_checkFinished();" />';
  _loopia_dnssectest_hidden_images += '<img height="1" width="1" src="' + badzone_url + 'empty_badzone.gif" id="_loopia_dnssectest_badzone_img" onload="_loopia_dnssectest_badzone_done = 1; _loopia_dnssectest_checkFinished();" onerror="_loopia_dnssectest_badzone_done = 2; _loopia_dnssectest_checkFinished();" />';

  _loopia_dnssectest_hiddendiv.innerHTML = _loopia_dnssectest_hiddendiv.innerHTML + '<div style="display: none;">' + _loopia_dnssectest_hidden_images + '</div>';
}
 
  
function _loopia_dnssectest_checkFinished() {
  if ((!_loopia_dnssectest_goodzone_done) || (!_loopia_dnssectest_badzone_done)) {
    if (!_loopia_dnssectest_timeout_func) {
      _loopia_dnssectest_timeout_func = window.setTimeout('_loopia_dnssectest_sendFinalResults()', _loopia_dnssectest_timeout);
    }
  } else {
    _loopia_dnssectest_sendFinalResults();
  }
}
 
function _loopia_dnssectest_sendFinalResults() {
  if (!_loopia_dnssectest_done) {
    if (_loopia_dnssectest_timeout_func) {
      window.clearTimeout(_loopia_dnssectest_timeout_func);
    }

    var _loopia_dnssectest_status;

    if (_loopia_dnssectest_goodzone_done == 0 || _loopia_dnssectest_goodzone_done == 2) {
      _loopia_dnssectest_status = "dnssec_not_working";
    } else {
      if (_loopia_dnssectest_badzone_done == 0 || _loopia_dnssectest_badzone_done == 2) {
        _loopia_dnssectest_status = "dnssec_working_and_verified";
      } else {
        _loopia_dnssectest_status = "dnssec_working_but_not_verified";
      }
    }

    var _loopia_dnssectest_resultdiv = document.getElementById(_loopia_dnssectest_resultdiv_id);
    _loopia_dnssectest_resultdiv.className = _loopia_dnssectest_status;

    var _loopia_dnssectest_infotext = document.getElementById("dnssec_info_init");
    _loopia_dnssectest_infotext.style.display = "none";

    var infotext = "not_working";
    if (_loopia_dnssectest_status == "dnssec_working_and_verified") {
      infotext = "working";
    }

    _loopia_dnssectest_infotext = document.getElementById("dnssec_info_" + infotext);
    _loopia_dnssectest_infotext.style.display = "block";

                _loopia_dnssectest_done = 1;
  }
}