另一个简单的计时 - 在线编辑器

          <!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>蜜蜂教程(mifengjc.com)</title>
</head>
<head>
  <script>
    function timedText() {
      var x = document.getElementById('txt');
      var t1 = setTimeout(function() {
        x.value = "2 seconds"
      }, 2000);
      var t2 = setTimeout(function() {
        x.value = "4 seconds"
      }, 4000);
      var t3 = setTimeout(function() {
        x.value = "6 seconds"
      }, 6000);
    }
  </script>
</head>
<body>

  <form>
    <input type="button" value="显示文本时间!" onclick="timedText()" />
    <input type="text" id="txt" />
  </form>
  <p>点击上面的按钮，输出的文本将告诉你2秒，4秒，6秒已经过去了。</p>
</body>

</html>
        