js操作cookie

var CookieUtil = {

//根据key读取cookie

    get: function (name){

        //注意对键编码

        var cookieName = encodeURIComponent(name) + "=",

            cookieStart = document.cookie.indexOf(cookieName),

            cookieValue = null,

            cookieEnd;

        //找到cookie键

        if (cookieStart > -1){

            //键后面第一个分号位置

            cookieEnd = document.cookie.indexOf(";", cookieStart);

            if (cookieEnd == -1){

                cookieEnd = document.cookie.length;

            }

            //cookie值解码

            cookieValue = decodeURIComponent(document.cookie.substring(cookieStart + cookieName.length, cookieEnd));

        }

        return cookieValue;

    },

    //设置cookie

    set: function (name, value, expires, path, domain, secure) {

        var cookieText = encodeURIComponent(name) + "=" + encodeURIComponent(value);

        //失效时间，GMT时间格式

        if (expires instanceof Date) {

            cookieText += "; expires=" + expires.toGMTString();

        }

        if (path) {

            cookieText += "; path=" + path;

        }

        if (domain) {

            cookieText += "; domain=" + domain;

        }

        if (secure) {

            cookieText += "; secure";

        }

        document.cookie = cookieText;

    },

setAllExpires:function (expires, path, domain, secure) {

        subCookies = document.cookie.split(";");

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

var cookieText =subCookies[i];

//失效时间，GMT时间格式

if (expires instanceof Date) {

cookieText += "; expires=" + expires.toGMTString();

}

if (path) {

cookieText += "; path=" + path;

}

if (domain) {

cookieText += "; domain=" + domain;

}

if (secure) {

cookieText += "; secure";

}

document.cookie = cookieText;

}

    },

    //删除cookie，保持相同的键、域、路径、安全选项，然后设置失效时间即可

    unset: function (name, path, domain, secure){

var date = new Date();

        date.setTime(date.getTime() - 10000);

        this.set(name, "a", date, path, domain, secure);

    },

clear:function (name, path, domain, secure){

setAllExpires(new Date(0));

$(location).attr('href',window.location.protocol+"//"+window.location.hostname+":"+window.location.port+window.location.pathname+location.search);

    },

};