var popupWindow;
function closePopup() {
  if (popupWindow && popupWindow.location && ! popupWindow.closed) popupWindow.close();
}
function openPopup(width, height, url, title) {
  closePopup();
  popupWindow = window.open("../pages/popup.php?image=" + url, "popup", "width=" + width + ", height=" + height+ ",menubar=yes");
}
function popupImage(url, title) {
  var image = new Image();
  image.onload = function () { openPopup(image.width, image.height, url, title); };
  image.src = url;
}