代码：

复制代码 代码如下:

jQuery.cookie = function(name, value, options) {

if (typeof value != 'undefined') { // name and value given, set cookie

options = options || {};

if (value === null) {

value = '';

options = $.extend({}, options); // clone object since it's unexpected behavior if the expired property were changed

options.expires = -1;

}

var expires = '';

if (options.expires && (typeof options.expires == 'number' || options.expires.toUTCString)) {

var date;

if (typeof options.expires == 'number') {

date = new Date();

date.setTime(date.getTime() (options.expires * 24 * 60 * 60 * 1000));

} else {

date = options.expires;

}

expires = '; expires=' date.toUTCString(); // use expires attribute, max-age is not supported by IE

}

// NOTE Needed to parenthesize options.path and options.domain

// in the following expressions, otherwise they evaluate to undefined

// in the packed version for some reason...

var path = options.path ? '; path=' (options.path) : '';

var domain = options.domain ? '; domain=' (options.domain) : '';

var secure = options.secure ? '; secure' : '';

document.cookie = [name, '=', encodeURIComponent(value), expires, path, domain, secure].join('');

} else { // only name given, get cookie

var cookieValue = null;

if (document.cookie && document.cookie != '') {

var cookies = document.cookie.split(';');

for (var i = 0; i < cookies.length; i ) {

var cookie = jQuery.trim(cookies[i]);

// Does this cookie string begin with the name we want?

if (cookie.substring(0, name.length 1) == (name '=')) {

cookieValue = decodeURIComponent(cookie.substring(name.length 1));

break;

}

}

}

return cookieValue;

}

};

使用方法

jQuery操作cookie的插件,大概的使用方法如下

$.cookie('the_cookie'); //读取Cookie值

$.cookie('the_cookie', 'the_value'); //设置cookie的值

$.cookie('the_cookie', 'the_value', {expires: 7, path: '/', domain: 'jquery.com', secure: true});//新建一个cookie 包括有效期 路径 域名等

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

$.cookie('the_cookie', null); //删除一个cookie

设置一个名称为blog，值为css9.net的cookie:

$.cookie("blog", "css9.net");

设置一个名称为blog，值为css9.net的cookie，同时设置过期时间（expires属性）为7天：

$.cookie("blog", "css9.net", { expires: 7 });

设置一个名称为blog，值为css9.net的cookie，设置过期时间（expires属性）为7天，同时设置cookie的path属性为”/admin”

$.cookie("blog", "css9.net", { path: '/admin', expires: 7 });

读取Cookie：

读取名称为blog的cookie值：

alert( $.cookie("blog") );

删除cookie：

$.cookie("example", null);