這個代碼有錯誤嗎？為什么提交后文本框?yàn)榭瞻滓恢辈粍樱?/h1>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>計(jì)時器</title>
<script type="text/javascript">
?var num=0;
?function q()
?{
? ? ?document.getElementById("count").value=num;
? ? ?num++;
? ? ?setTimeout("q()",200);
?}
? q();
</script>
</head>
<body>
<form>
<input type="text" id="count"/>
</form>
</body>
</html>
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>計(jì)時器</title>
<script type="text/javascript">
?var num=0;
?function q()
?{
? ? ?document.getElementById("count").value=num;
? ? ?num++;
? ? ?setTimeout("q()",200);
?}
? q();
</script>
</head>
<body>
<form>
<input type="text" id="count"/>
</form>
</body>
</html>
2019-08-08