[HTML]时钟

<div class="clock" id="clock">
    <!-- 原点 -->
    <div class="origin"></div>

    <!-- 时分秒针 -->
    <div class="clock-line hour-line" id="hour-line"></div>
    <div class="clock-line minute-line" id="minute-line"></div>
    <div class="clock-line second-line" id="second-line"></div>

    <!-- 日期 -->
    <div class="date-info" id="date-info"></div>
    <!-- 时间 -->
    <div class="time-info" >
      <div class="time" id="hour-time"></div>
      <div class="time" id="minute-time"></div>
      <div class="time" id="second-time"></div>
    </div>
  </div>
<script type='text/javascript' src='外部的javascript文件路径'></script>

<script>(function(){
    window.onload=initNumXY(200, 160, 40,40);
    var hour_line = document.getElementById("hour-line");
    var minute_line = document.getElementById("minute-line");
    var second_line = document.getElementById("second-line");
    var date_info = document.getElementById("date-info");
    var week_day = [
      '星期日', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六'
    ];
    var hour_time = document.getElementById("hour-time");
    var minute_time = document.getElementById("minute-time");
    var second_time = document.getElementById("second-time");
    function setTime(){
      var this_day = new Date();
      var hour = (this_day.getHours() >= 12) ?
          (this_day.getHours() - 12) : this_day.getHours();
      var minute = this_day.getMinutes();
      var second = this_day.getSeconds();
      var hour_rotate = (hour*30-90) + (Math.floor(minute / 12) * 6);
      var year = this_day.getFullYear();
      var month = ((this_day.getMonth() + 1) < 10 ) ?
          "0"+(this_day.getMonth() + 1) : (this_day.getMonth() + 1);
      var date = (this_day.getDate() < 10 ) ?
          "0"+this_day.getDate() : this_day.getDate();
      var day = this_day.getDay();
      hour_line.style.transform = 'rotate(' + hour_rotate + 'deg)';
      minute_line.style.transform = 'rotate(' + (minute*6 - 90) + 'deg)';
      second_line.style.transform = 'rotate(' + (second*6 - 90)+'deg)';
      date_info.innerHTML =
        year + "-" + month + "-" + date + " " + week_day[day];
      hour_time.innerHTML = (this_day.getHours() < 10) ?
          "0" + this_day.getHours() : this_day.getHours();
      minute_time.innerHTML = (this_day.getMinutes() < 10) ?
          "0" + this_day.getMinutes() : this_day.getMinutes();
      second_time.innerHTML = (this_day.getSeconds() < 10) ?
          "0" + this_day.getSeconds():this_day.getSeconds();
    }
    setInterval(setTime, 1000);

    function initNumXY(R, r, w, h){
      var numXY = [
        {
          "left" : R + 0.5 * r - 0.5 * w,
          "top" : R - 0.5 * r * 1.73205 - 0.5 * h
        },
        {
          "left" : R + 0.5 * r * 1.73205 - 0.5 * w,
          "top" : R - 0.5 * r - 0.5 * h
        },
        {
          "left" : R + r - 0.5 * w,
          "top" : R - 0.5 * h
        },
        {
          "left" : R + 0.5 * r * 1.73205 - 0.5 * w,
          "top" : R + 0.5 * r - 0.5 * h
        },
        {
          "left" : R + 0.5 * r - 0.5 * w,
          "top" : R + 0.5 * r * 1.732 - 0.5 * h
        },
        {
          "left" : R - 0.5 * w,
          "top" : R + r - 0.5 * h
        },
        {
          "left" : R - 0.5 * r - 0.5 * w,
          "top" : R + 0.5 * r * 1.732 - 0.5 * h
        },
        {
          "left" : R - 0.5 * r * 1.73205 - 0.5 * w,
          "top" : R + 0.5 * r - 0.5 * h
        },
        {
          "left" : R - r - 0.5 * w,
          "top" : R - 0.5 * h
        },
        {
          "left" : R - 0.5 * r * 1.73205 - 0.5 * w,
          "top" : R - 0.5 * r - 0.5 * h
        },
        {
          "left" : R - 0.5 * r - 0.5 * w,
          "top": R - 0.5 * r * 1.73205 - 0.5 * h
        },
        {
          "left" : R - 0.5 * w,
          "top" : R - r - 0.5 * h
        }
      ];
      var clock = document.getElementById("clock");
      for(var i = 1; i <= 12; i++){
        if(i%3 == 0) {
          clock.innerHTML += "<div class='clock-num em_num'>"+i+"</div>";
        } else {
          clock.innerHTML += "<div class='clock-num'>" + i + "</div>";
        }
      }
      var clock_num = document.getElementsByClassName("clock-num");
      for(var i = 0; i < clock_num.length; i++) {
        clock_num[i].style.left = numXY[i].left + 'px';
        clock_num[i].style.top = numXY[i].top + 'px';
      }
      for(var i = 0; i < 60; i++) {
        clock.innerHTML += "<div class='clock-scale'> " +
                   "<div class='scale-hidden'></div>" +
                   "<div class='scale-show'></div>" +
                  "</div>";
      }
      var scale = document.getElementsByClassName("clock-scale");
      for(var i = 0; i < scale.length; i++) {
        scale[i].style.transform="rotate(" + (i * 6 - 90) + "deg)";
      }
    }
})()</script>;