function popupWindow(url, win_name, w, h, menu) {
  var wx = 760;
  var hy = 570;
  var with_menu = 'no';
  
  if (typeof(w) != 'undefined') {
    if (!isNaN(w) && w > 0) {
      wx = w;
    }   
  }
  if (typeof(h) != 'undefined') {
    if (!isNaN(h) && h > 0) {
      hy = h;
    }
  }
  if (typeof(menu) != 'undefined') {
    if (menu == true) {
      with_menu = 'yes';
    }
  } 
  window.open(url, win_name, 'toolbar=no,location=no,directories=no,status=no,menubar=' + with_menu + ',scrollbars=yes,resizable=yes,copyhistory=no,width=' + wx + ',height=' + hy +',screenX=10,screenY=10,top=10,left=10');
}