gistfile1.txt

// images = [{ name: 'image name', data: [data or data url] }]

(function($) {

  $.imageUrl = function(images, key) {
    var imageObject = $.grep(images, function(e){ return e.name == key; });
    if(imageObject.length > 0) {
        return imageObject[0].data;
    } else {
        return null;
    }
  };

})(jQuery);