代碼……運行不粗來
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>計時器</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>
2015-06-21
你的function startContent ```調(diào)用的名稱卻是 numCount
setTimeout里使用方法方式不對
<!DOCTYPE?HTML> <html> <head> <meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"> <title>計時器</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>