function getTime() {
          var date = new Date();
          var year = date.getFullYear().toString() + "年";
          var month = (date.getMonth() + 1) + "月";
          var day = date.getDate().toString() + "日 ";
          var hour = date.getHours().toString() + "时";
          var minutes = date.getMinutes().toString();
          var seconds = date.getSeconds().toString();
          if (minutes.toString() < 10) {
              minutes = "0" + minutes;
          }
          if (seconds < 10) {
              seconds = "0" + seconds;
          }
          var week = ["星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六", " "];
          var weekday = week[7] + week[date.getDay()];
          document.getElementById("timeSpan").innerHTML = year + month + day + hour + minutes + "分" + seconds + "秒" + weekday;
      }
      setInterval(getTime, 1000);