 + "-" + Math.random() * 10000;
    }

    function getNow() {
      var now = new Date();

      var year = now.getFullYear(); //年
      var month = now.getMonth() + 1; //月
      var day = now.getDate(); //日

      var hh = now.getHours(); //时
      var mm = now.getMinutes(); //分
      var ss = now.getSeconds(); //秒

      var clock = year + "-";

      if (month < 10)
        clock += "0";

      clock += month + "-";

      if (day < 10)
        clock += "0";

      clock += day + " ";

     