lightbox.js customization for pragmatically setting options and initializing

layout.html

<!--
  In lightbox.js you need to remove the initialization function call at the bottom.
  Lines highlighted here: https://github.com/lokesh/lightbox2/blob/master/js/lightbox.js#L345-349
  This is what "starts" lightbox. 
  Place the initialization function at the bottom of one of your html layouts like so:
-->

<script>
$(function() {
    var lightbox, options;
    options = new LightboxOptions;
    options.fileLoadingImage = 'images/loading.gif';
    options.fileCloseImage = 'images/close.png';

    return lightbox = new Lightbox(options);
  });
</script>

<!--
  Once it's in the layouts.html file, you are free to use the mustache syntax to replace the image paths:
-->

<script>
$(function() {
    var lightbox, options;
    options = new LightboxOptions;
    options.fileLoadingImage = '{{urls.media}}/loading.gif';
    options.fileCloseImage = '{{urls.media}}/close.png';

    return lightbox = new Lightbox(options);
  });
</script>