function windowOpenPopup(url, title, w, h) {
  // 현재 모니터에서 팝업 위치 계산
  var left = window.screenLeft + (window.innerWidth - w) / 2;
  var top = window.screenTop + (window.innerHeight - h) / 2;

  var popup = window.open(
    url,
    title,
    "width=" + w +
    ",height=" + h +
    ",left=" + left +
    ",top=" + top +
    ",scrollbars=yes,resizable=yes"
  );

}