$(document).ready(function() {
  $('a.lightbox').lightBox({
  overlayBgColor: '#779CCF',
  overlayOpacity: .5,
  imageBtnPrev: 'images/lightbox-btn-prev.png',
  imageBtnNext: 'images/lightbox-btn-next.png',
  imageLoading: 'images/index_loader.gif'
  });
});