//定时更换图片：  调用：smileChange.start();  smileChange.stop();

var smileChange = {

            start: function () {

                var that = this;//鍐呭眰鐨勫唴灞傚嚱鏁扮殑this浼氬嚭闂

                this.intervalId = setInterval(function () {

                    clearTimeout(that.timeoutId);

                    $(".third .smile img").attr("src", "img/smile-on-2.png");

                    that.timeoutId = setTimeout(function () {

                        $(".third .smile img").attr("src", "img/smile-off-2.png");

                    }, 500);

                    //console.log("start  timeout ID "+that.timeoutId);

                }, 1000);

            },

            stop: function () {

                console.log("stop timeout id" + this.timeoutId);

                clearInterval(this.intervalId);

                clearTimeout(this.timeoutId);

                console.log("stop interval id" + this.intervalId);

            },

            changing: 0,

            intervalId: 0,

            timeoutId: 0

        }