// image preloading
(function($) {
  var cache = [];
  // Arguments are image paths relative to the current page.
  $.preLoadImages = function() {
	var args_len = arguments.length;
	for (var i = args_len; i--;) {
	  var cacheImage = document.createElement('img');
	  cacheImage.src = arguments[i];
	  cache.push(cacheImage);
	}
  }
})(jQuery);