function open_desktop_image(image, width, height) {
  
  var window_name = image + '_' + width + 'x' + height + '_WIN';
  var page_location = "/desktops/images/" + image + "_PsychaDurmont_Desktop_" + width + "x" + height + ".jpg";
  
  var ratio = width / height;
  
  var ScreenY = 150;
  var ScreenX = (ScreenY * ratio);
    
  var isIE = navigator.appName.indexOf("Microsoft") != -1;
  if(isIE) { width = width + 25; height = height + 25; };
  
  PopUp_Win = window.open(page_location,window_name,
                          'toolbar=no,width=300,height=200,screenX=' + ScreenX + ',screenY=' + ScreenY + ',alwaysRaised=yes,location=no,directories=no,status=no,scrollbars=yes,resizable=yes,menubar=no');
  PopUp_Win.focus();
}