jquery.cookie.js外掛：

<scripttype="text/javascript"src="js/jquery-1.6.2.min.js"></script>

<scripttype="text/javascript"src="js/jquery.cookie.js"></script>

新增cookie：

　　$.cookie('cookieName','cookieValue');

　　注：如果沒有設定cookie的有效期，則cookie預設在瀏覽器關閉前都有效，故被稱為"會話cookie"。

　　//建立一個cookie並設定有效時間為7天:

　　 $.cookie('cookieName','cookieValue',{expires:7});

　　//建立一個cookie並設定cookie的有效路徑：

　　$.cookie('cookieName','cookieValue',{expires:7,path:'/'});

讀取cookie：

　　$.cookie('cookieName');//若cookie存在則返回'cookieValue'；若cookie不存在則返回null

刪除cookie：把ncookie的值設為null即可

　　$.cookie('the_cookie',null);

jquery.cookie.js

/*! jquery.cookie v1.4.1 | MIT */
!function(a){"function"==typeof define&&define.amd?define(["jquery"],a):"object"==typeof exports?a(require("jquery")):a(jQuery)}(function(a){function b(a){return h.raw?a:encodeURIComponent(a)}function c(a){return h.raw?a:decodeURIComponent(a)}function d(a){return
 
 b(h.json?JSON.stringify(a):String(a))}function e(a){0===a.indexOf('"')&&(a=a.slice(1,-1).replace(/\\"/g,'"').replace(/\\\\/g,"\\"));try{return a=decodeURIComponent(a.replace(g," ")),h.json?JSON.parse(a):a}catch(b){}}function f(b,c){var d=h.raw?b:e(b);return a.isFunction(c)?c(d):d}var g=/\+/g,h=a.cookie=function(e,g,i){if(void 0!==g&&!a.isFunction(g)){if(i=a.extend({},h.defaults,i),"number"==typeof i.expires){var j=i.expires,k=i.expires=new Date;k.setTime(+k+864e5*j)}return document.cookie=[b(e),"=",d(g),i.expires?"; expires="+i.expires.toUTCString():"",i.path?"; path="+i.path:"",i.domain?"; domain="+i.domain:"",i.secure?"; secure":""].join("")}for(var l=e?void 0:{},m=document.cookie?document.cookie.split("; "):[],n=0,o=m.length;o>n;n++){var p=m[n].split("="),q=c(p.shift()),r=p.join("=");if(e&&e===q){l=f(r,g);break}e||void 0===(r=f(r))||(l[q]=r)}return l};h.defaults={},a.removeCookie=function(b,c){return void 0===a.cookie(b)?!1:(a.cookie(b,"",a.extend({},c,{expires:-1})),!a.cookie(b))}});

https://blog.csdn.net/mharvay_888/article/details/80448025