請(qǐng)問哪里錯(cuò)了 文本框沒顯示數(shù)值
<!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;
? ? setTimeout("starCount()",1000);?
? }
</script>
</head>
<body>
<form>
<input type="text" id="count" />
</form>
</body>
</html>
2019-04-13
你要執(zhí)行函數(shù)啊，不然寫了函數(shù)干嘛用，在函數(shù)后面加上代碼：setTimeout("startCount()",1000);
2019-07-04
starCount改成stratCount,少寫了個(gè)t
2019-04-12
<!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()?{ ????????????console.log(num); ????????????document.getElementById('count').value=num++; ????????} ????????setInterval("startCount()",1000); ????</script> </head> <body> <form> ????<input?type="text"?id="count"?/> </form> </body> </html>兄弟，你用的setTimeout函數(shù)只執(zhí)行一次的，應(yīng)該用setInterval