<script src="/path/to/jquery.js"></script>
<script src="/path/to/jquery.cookie.js"></script>

$.cookie('the_cookie', 'the_value');

$.cookie('the_cookie', 'the_value', { expires: 7 });

$.cookie('the_cookie', 'the_value', { expires: 7, path: '/' });

$.cookie('the_cookie'); // => "the_value"
$.cookie('not_existing'); // => undefined

$.cookie(); // => { "the_cookie": "the_value", "...remaining": "cookies" }

// 找到指定的cookie返回true，否则返回false
$.removeCookie('the_cookie');
// 删除指定过path的cookie
$.removeCookie('the_cookie', { path: '/' });

$.cookie.raw = true;

$.cookie.json = true;

/*!
 * jQuery Cookie Plugin v1.3.1
 * https://github.com/carhartl/jquery-cookie
 *
 * Copyright 2013 Klaus Hartl
 * Released under the MIT license
 */
(function (factory) {
	if (typeof define === 'function' && define.amd) {
		// AMD. Register as anonymous module.
		define(['jquery'], factory);
	} else {
		// Browser globals.
		factory(jQuery);
	}
}(function ($) {

	var pluses = /\+/g;

	function raw(s) {
		return s;
	}

	function decoded(s) {
		return decodeURIComponent(s.replace(pluses, ' '));
	}

	function converted(s) {
		if (s.indexOf('"') === 0) {
			// This is a quoted cookie as according to RFC2068, unescape
			s = s.slice(1, -1).replace(/\\"/g, '"').replace(/\\\\/g, '\\');
		}
		try {
			return config.json ? JSON.parse(s) : s;
		} catch(er) {}
	}

	var config = $.cookie = function (key, value, options) {

		// write
		if (value !== undefined) {
			options = $.extend({}, config.defaults, options);

			if (typeof options.expires === 'number') {
				var days = options.expires, t = options.expires = new Date();
				t.setDate(t.getDate() + days);
			}

			value = config.json ? JSON.stringify(value) : String(value);

			return (document.cookie = [
				config.raw ? key : encodeURIComponent(key),
				'=',
				config.raw ? value : encodeURIComponent(value),
				options.expires ? '; expires=' + options.expires.toUTCString() : '', // use expires attribute, max-age is not supported by IE
				options.path    ? '; path=' + options.path : '',
				options.domain  ? '; domain=' + options.domain : '',
				options.secure  ? '; secure' : ''
			].join(''));
		}

		// read
		var decode = config.raw ? raw : decoded;
		var cookies = document.cookie.split('; ');
		var result = key ? undefined : {};
		for (var i = 0, l = cookies.length; i < l; i++) {
			var parts = cookies[i].split('=');
			var name = decode(parts.shift());
			var cookie = decode(parts.join('='));

			if (key && key === name) {
				result = converted(cookie);
				break;
			}

			if (!key) {
				result[name] = converted(cookie);
			}
		}

		return result;
	};

	config.defaults = {};

	$.removeCookie = function (key, options) {
		if ($.cookie(key) !== undefined) {
			// Must not alter options, thus extending a fresh object...
			$.cookie(key, '', $.extend({}, options, { expires: -1 }));
			return true;
		}
		return false;
	};

}));