//倒计时8分钟    var getTime=sessionStorage.getItem("zicetime");    var intDiff = parseInt(getTime * 60);//倒计时总秒数量    function timer(intDiff){        window.setInterval(function(){        var day=0,            hour=0,            minute=0,            second=0;//时间默认值                if(intDiff > 0){            day = Math.floor(intDiff / (60 * 60 * 24));            hour = Math.floor(intDiff / (60 * 60)) - (day * 24);            minute = Math.floor(intDiff / 60) - (day * 24 * 60) - (hour * 60);            second = Math.floor(intDiff) - (day * 24 * 60 * 60) - (hour * 60 * 60) - (minute * 60);        }        if (minute <= 9) minute = '0' + minute;        if (second <= 9) second = '0' + second;       // $('#day_show').html(day+"天");        $('#hour_show').html(''+hour+'时');        $('#minute_show').html(''+minute+'分');        $('#second_show').html(''+second+'秒');        intDiff--;        // if(intDiff==50){
            //   alert(123)        // }        }, 1000);    }     $(function(){        timer(intDiff);    });