Lightview.options.overlay.background='#000';
Lightview.options.overlay.opacity='0.6';
Lightview.options.defaultOptions.iframe={ 
  width: 590, 
  height: 430, 
  scrolling: false, 
  closeButton: 'small' 
}; 
Lightview.options.defaultOptions.inline={
  width: 590,
  height: 430,
  closeButton: false,
}