จะเพิ่ม target =“ _ blank” ใน JavaScript window.location ได้อย่างไร?

function ToKey() {
  var done = 0;
  var key = document.tokey.key.value;
  key = key.toLowerCase();
  if (key == "smk") {
    window.location = "http://www.smkproduction.eu5.org";
    target = "_blank"
    done = 1;
  }
  if (done == 0) {
    alert("Kodi nuk është valid!");
  }
}

<form name="tokey">
  <table>
    <tr>
      <td>Type the key</td>
      <td>
        <input type="text" name="key">
      </td>
      <td>
      </td>
      <td>
        <input type="button" value="Go" onClick="ToKey()">
      </td>
  </table>
</form>

    var linkGo = function(item) {
      $(item).on('click', function() {
        var _$this = $(this);
        var _urlBlank = _$this.attr("data-link");
        var _urlTemp = _$this.attr("data-url");
        if (_urlBlank === "_blank") {
          window.open(_urlTemp, '_blank');
        } else {
          // cross-origin
          location.href = _urlTemp;
        }
      });
    };

    linkGo(".button__main[data-link]");

.button{cursor:pointer;}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>


<span class="button button__main" data-link="" data-url="https://stackoverflow.com/">go stackoverflow</span>