问答详情
源自:8-3 计时器setInterval()

为什么document.write(time)就不能实现动态更新?​

<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
<script type="text/javascript">
  var int=setInterval(clock, 100)
  function clock(){
    var time=new Date();
    document.write(time);
  }
</script>
</head>
<body>
  <form>
    <input type="text" id="clock" size="50"  />
  </form>
</body>
</html>

提问者:caixiangqi 2015-03-17 16:54

个回答

  • caixiangqi
    2015-03-24 19:54:31

    谢谢 不过运行了你的代码,没有看到动态更新啊求解

  • 康振宁
    2015-03-18 20:14:17

    <!DOCTYPE HTML>
    <html>
    	<head>
    		<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
    		<title>计时器</title>
    		<script type="text/javascript">
    			var int=setInterval(clock, 100);
    			function clock(){
    				var time =new Date();
    				document.body.innerHTML="";
    				document.write(time);
    			}
    		</script>
    	</head>
    	<body>
    	</body>
    </html>

    这么写就可以了