Javascript 原生Cookie使用用法

var oCookie = {
    setCookie: function (name, value, expireDays, path, domain) {
        var expireDays = expireDays || 0,    //天数
           path = path || '/',    //路径
          domain = domain || '',    //域名
           date = new Date();
        date.setDate(date.getDate() + expireDays);
        document.cookie = escape(name) + '=' + escape(value) + ';expire=' + date.toGMTString() + ';path=' + path + ';domain=' + domain;
    },
    getCookie: function (name) {
        var str = document.cookie,
            arr = str.split('; '),
            _temp = '';
        for (var i in arr) {
            _temp = arr[i].split('=');
            if (_temp[0] == escape(name)) return unescape(_temp[1]);
        }
    },
    delCookie: function (name) {
        document.cookie = escape(name) + '=' + null + ';expires=' + (new Date(0)).toGMTString();
    }
}