Is it possible to change Facebox's settings at runtime? How?

Is it possible to access Facebox settings? For example, I'd like to do set the location of the loading image dynamically (see line 4):

&l开发者_StackOverflow社区t;script type="text/javascript" src="<?php echo base_url(); ?>media/facebox/facebox.js" ></script>
  <script type="text/javascript">
  $(document).ready(function(){
    Facebox.loadingImage = '<?php echo base_url(); ?>media/facebox/loading.gif'; // <-- is this possible?
    $('a[rel*=facebox]').facebox();
  });
</script>

Is this possible? How do I do that?

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It's possible:

$('a[rel*=facebox]').facebox({ 
    loading_image : '<?php echo base_url(); ?>media/facebox/loading.gif'
})