為什么輸出結(jié)果是undefined?
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>定時(shí)器</title>
<script type="text/javascript">
? var attime;
? function clock(){
? ? var time=new Date();? ? ? ? ??
? ?atime=time.getHours()+"時(shí)"+time.getMinutes()+"分"+time.getSeconds()+"秒";
? ? document.getElementById("clock").value = attime;
? }
? var int=setInterval(clock,100);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50"? />
</form>
</body>
</html>
2018-07-18
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>定時(shí)器</title>
<script type="text/javascript">
? var attime;
? function clock(){
? ? var time=new Date();? ? ? ? ??
? ? attime= time.getHours()+"時(shí)"+time.getMinutes()+"分"+time.getSeconds()+"秒";
? ? document.getElementById("clock").value = attime;
? }
? setInterval("clock()", 1000);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50"? />
</form>
</body>
</html>
2018-08-28
其實(shí)是因?yàn)槟阗x值的變量名字不正確
2018-07-18
細(xì)心一點(diǎn)哦