var background = (function() {
 var
  $obj = $('body:first'),
  dir = 'photos/',
  size = backgrounds.length || 0,
  current = 0,
  cookie_vars = {
   path: '/',
   domain: 'localhost'
  };
  
  go = function(i) {
   if (i === size) current = 0;
   else if (i < 0) current = size-1;
   else current = i;
   
   var id = $obj.hasClass('subsite') ? 1 : 0;
   $obj.css('background-image', 'url(' + dir + backgrounds[current][id] + ')');
   $.cookie('bg_id', current, cookie_vars);
  },
  randomImage = function() {
   return Math.round(Math.random() * (size -1));
  }
 
 return {
  isInit: function() {
   var result = (typeof backgrounds == 'object');
   
   if (result) {
    if ($.cookie('bg_id') != null) {
     go( parseInt($.cookie('bg_id')) );
    } else {
     go( randomImage() );
    }
   }
   return result;
  },
  previous: function() {
   go(--current);
   return false;
  },
  next: function() {
   go(++current);
   return false;
  }
 };
}());