jQuery cookie

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

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

03	options = options || {};

04	if (value === null) {

05	value = '';

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

07	options.expires = -1;

08

}

09	var expires = '';

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

11

var date;

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

13	date = new Date();

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

15

} else {

16	date = options.expires;

17

}

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

19

}

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

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

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

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

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

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

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

27	} else { // only name given, get cookie

28	var cookieValue = null;

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

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

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

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

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

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

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

36

break;

37

}

38

}

39

}

40	return cookieValue;

41

}

42

};

====================================

1	jQuery操作cookie的插件,大概的使用方法如下

2	$.cookie('the_cookie'); //读取Cookie值

3	$.cookie('the_cookie', 'the_value'); //设置cookie的值

4	$.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

5	$.cookie('the_cookie', 'the_value'); //新建cookie

6	$.cookie('the_cookie', null); //删除一个cookie