(function ($) {
	var imgList = [];
	$.extend({
		preload: function (imgArr, option) {
			var setting = $.extend({
				init: function (loaded, total) { },
				loaded: function (img, loaded, total) { },
				loaded_all: function (loaded, total) { }
			}, option);
			var total = imgArr.length;
			var loaded = 0;

			setting.init(0, total);
			for (var i in imgArr) {
				imgList.push($("<img />")
					.attr("src", imgArr[i])
					.load(function () {
						loaded++;
						setting.loaded(this, loaded, total);
						if (loaded == total) {
							setting.loaded_all(loaded, total);
						}
					})
				);
			}

		}
	});
})(jQuery);