function MessageNotice() {
    this.defaultTitle = document.title;
    this.message  = "【新消息】";
    this.emptyMsg = "【　　　】";
    //不少浏览器已经关闭了脚本化它们的状态栏的功能。
    this.noticeTimer = null;
    this.type = 0;
    this.data = null;
}

MessageNotice.prototype.startAnim = function (type, data) {
    this.type = type;
    this.data = data;

    this.stopAnim();
    var _message = this.message;
    var _emptyMsg = this.emptyMsg;
    var _defaultMsg = this.defaultTitle;
    this.noticeTimer = setInterval(function () {
        document.title = document.title == _message+_defaultMsg ? _emptyMsg+_defaultMsg : _message+_defaultMsg;
    }, 100);

    if (isNewQid && !isActiveBrowser && window.Notification || type == 1 && !isActiveBrowser && window.Notification) {
        if (Notification.permission == "granted") {
            this.pushNotice();
        } else if (Notification.permission != "denied") {
            Notification.requestPermission(function (permission) {
                MessageNotice.prototype.pushNotice();
            });
        }
    }
};

MessageNotice.prototype.pushNotice = function() {
    var objType = this.type;
    var objData = this.data;
    if (Notification.permission == "granted") {
        var notification = new Notification("", {
            body : "您有新的消息",
            icon : ""
        });
        notification.onclick = function () {
            if (objType== 1) {
                $("#userList>a>span[data-uid="+objData.toUserId+"]").parent().click();
                $("#answerList>a[data-target-uid="+objData.toUserId+"][data-uid="+objData.targetUserId+"][data-qid="+objData.qid+"]").click();
            } else if (objType == 2) {
                $("#show-problem").click();
            }
            //跳回浏览器
            window.focus();
            notification.close();
        }
    } else {
        console.log('浏览器不支持Notification');
    }
};

MessageNotice.prototype.stopAnim = function () {
    clearInterval(this.noticeTimer);
    document.title = this.defaultTitle;
};