8-5 點(diǎn)擊開始計(jì)算為什么只會(huì)閃爍下0，就沒有了
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>計(jì)時(shí)器</title>
<script type="text/javascript">
//? ?var num=0;
//? ?function startCount() {
//? ? ?document.getElementById('count').value=num;
//? ? ?num=num+1;
? ? ?
//? ?}
? var num=0;
? function countNum(){
? ? ? document.getElementById("count").value=num;
? ? ? num++;
? ? ? setTimeout("countNum()",1000);
? }
</script>
</head>
<body>
<form>
<input type="text" id="count" onclick="countNum()"/>
</form>
</body>
</html>
2018-10-24
不用這一句啊，你上面的就可以完成，點(diǎn)一下輸入框
2018-10-12
<input type="submit" value="開始計(jì)數(shù)" onClick="countNum()">
這句忘寫了