jquery 插件标准模板

自fullCalendar插件抽取，比较经典，收藏备用。

(function($, undefined) {

	var defaults = {};

	$.fn.zDropMenu = function(options) {

		// method calling
		if( typeof options == 'string') {
			var args = Array.prototype.slice.call(arguments, 1);
			var res;
			this.each(function() {
				var dropmenu = $.data(this, 'zDropMenu');
				if(dropmenu && $.isFunction(dropmenu[options])) {
					var r = dropmenu[options].apply(dropmenu, args);
					if(res === undefined) {
						res = r;
					}
					if(options == 'destroy') {
						$.removeData(this, 'zDropMenu');
					}
				}
			});
			if(res !== undefined) {
				return res;
			}
			return this;
		}
		options = $.extend({}, defaults, options);

		this.each(function(i, _element) {
			var element = $(_element);
			var dropmenu = new zDropMenu(element, options);
			element.data('zDropMenu', dropmenu);
			// TODO: look into memory leak implications
			dropmenu.init();
		});
		return this;

	};
	//classes/prototyping
	function zDropMenu() {

	}

})(jQuery);