function imagePopup(mode, gallery, imgname) {
  var url = "/exhibition/" + mode + "/" + gallery + "/gallery/detail/" + imgname;
  var w = 470;
  var h = 680;
  var newWindow =
  window.open(url,'popup','width=' + w + ',height=' + h + ',top=' + 0
  + ',left=' + (screen.width - w) / 2 + ',location=0,directories=0,status=no,menuBar=no,scrollBars=yes,resizable=yes');
  newWindow.focus();  
}