var intDiff = parseInt(600);//倒計時總秒數量    function timer(intDiff){      window.setInterval(function(){      var day=0,        hour=0,        minute=0,        second=0;//時間默認值          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);      }else{//當時間耗盡，刷新頁面        window.location.reload();      }      if (minute <= 9) minute = '0' + minute;      if (second <= 9) second = '0' + second;      $(".timeShow").html('本頁數據還剩下<font>'+minute+'分'+second+'</font>秒刷新,刷新間隔時間: 10 分鐘');      intDiff--;      }, 1000);    }     $(function(){      timer(intDiff);    });

<span class="timeShow"></span>