怎么理解document getElementById("clock()") value=time;-慕课网

怎么理解document getElementById("clock()") value=time;

来源：8-4 取消计时器clearInterval()

samson001

2018-04-18 15:31

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
   function clock(){
      var time=new Date();                     
            document.getElementById("clock").value = time;
   }// 每隔100毫秒调用clock函数，并将返回值赋值给i
     var i=setInterval("clock()",100);
</script>
</head>
<body>
  <form>
    <input type="text" id="clock" size="50"  />
    <input type="button" value="Stop" onclick="clearInterval(i)"  />
  </form>
</body>
</html>

写回答关注