问答详情
源自：8-5 计时器setTimeout()

代码……运行不粗来

<!DOCTYPE HTML>

<html>

<head>

<meta http-equiv="Content-Type" content="text/html; charset=utf-8">

<title>计时器</title>

</head>

<script type="text/javascript">

  var num=0;

  function startCount() {

    document.getElementById('count').value=num;

    num=num+1;

    setTimeout("numCount()",1000); 

  }

  

</script>

</head>

<body>

<form>

<input type="text" id="count" />

<input type="button" value="start" onclick="numCount()">

</form>

</body>

</html>


提问者：努力做梦打怪兽 2015-06-20 21:06

个回答

  • 不断滴自我催眠
    2015-06-21 09:33:34

    1. 你的function startContent ```调用的名称却是 numCount

    2. setTimeout里使用方法方式不对

    3. <!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>计时器</title>
</head>
<script type="text/javascript">
  var num=0;
  function numCount() {
    document.getElementById('count').value=num;
    num=num+1;
    setTimeout(numCount,1000); 
  }
  
</script>
</head>
<body>
<form>
<input type="text" id="count" />
<input type="button" value="start" onclick="numCount()">
</form>
</body>
</html>

    0