// JavaScript Document
(function($){

	$.randomImage = {
		defaults: {
			path: '/images/random_homePage/', 
			myImages: ['Cartolina_02.jpg', 'Cartolina_03.jpg', 'Cartolina_05.jpg', 'Cartolina_06.jpg', 'Cartolina_09.jpg', 'Cartolina_10.jpg', 'Cartolina_11.jpg', 'Cartolina_12.jpg' ]
		}
	}

	$.fn.extend({
		randomImage:function(config) {
			var config = $.extend({}, $.randomImage.defaults, config); 
			return this.each(function() {
				var imageNames = config.myImages;
				//get size of array, randomize a number from this
				// use this number as the array index
				var imageNamesSize = imageNames.length;
				var lotteryNumber = Math.floor(Math.random()*imageNamesSize);
				var winnerImage = imageNames[lotteryNumber];
				var fullPath = config.path + winnerImage;
						
				//put this image into DOM at class of randomImage
				// alt tag will be image filename.
				$(this).attr( {
					src: fullPath,
					alt: winnerImage
				});
			});
		}
	});
})(jQuery);