(function(){

    var PotatogCookie = {};

    //设置cookie

    PotatogCookie.set = function(key, value, delay)

    {

        //默认cookie为七天之后过期 3s 4m 5h 7d 秒 分 时 天

        if(delay == "undefined")delay = "7d";

        delay = delay.toLowerCase();

        var expireDate = new Date();

        var num = parseInt(delay);

        if(delay.indexOf("d") !== -1)

        {

            expireDate.setDate(expireDate.getDate() + num);

        }

        else if(delay.indexOf("h") !== -1)

        {

            expireDate.setHours(expireDate.getHours() + num);

        }

        else if(delay.indexOf("m") !== -1)

        {

            expireDate.setMinutes(expireDate.getMinutes() + num);

        }

        else if(delay.indexOf("s") !== -1)

        {

            expireDate.setSeconds(expireDate.getSeconds() + num);

        }

        else

        {

            expireDate.setDate(expireDate.getDate() + num);

        }

        if(typeof value == "object")

        {

            value = JSON.stringify(value);

        }

        value = escape(value);

        document.cookie = key + "=" + value + ";expires=" + expireDate.toGMTString();

        return this.get(key);

    }

    //得到cookie 如果不存在 返回 undefined

    PotatogCookie.get = function(key)

    {

        var objCookie = {};

        var cookie = document.cookie;

        var keyValueList = cookie.split(";");

        for(var index in keyValueList)

        {

            var keyValue = keyValueList[index].split("=");

            var k = keyValue[0].trim();

            var v = keyValue[1];
　　　　　　　　　v = unescape(v);

            v = this.decodeJson(v);

            objCookie[k] = v;

        }

        if(typeof key == "undefined")

        {

            return objCookie;

        }

        return objCookie[key];

    }

    //删除cookie

    PotatogCookie.del = function(key)

    {

        //删除所有cookie

        if(typeof key == "undefined")

        {

            var cookieList = this.get();

            for(key in cookieList)

            {

                this.del(key);

            }

            return true;

        }

        else

        {

            if(this.get(key) == "undefined")

            {

                return false;

            }

            else

            {

                return this.set(key,'',"0s");

            }

        }

    }

    PotatogCookie.decodeJson = function(value)

    {

        //数组转成的对象字符串

        var regAryStr = /^\[[\s|\S]*\]$/;

        //对象转成的对象字符串

        var regObjStr = /^\{([\"\s|\S]+\"\:\"[\s|\S]*)+\"\}$/;

        if(regAryStr.test(value))

        {

            return eval("(" + value + ")");

        }

        if(regObjStr.test(value))

        {

            return JSON.parse(value);

        }

        return value;

    }

    window.pCookie = PotatogCookie;

})(window);