为什么输出结果是undefined?
慕神2773585
2018-07-18 08:39
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>定时器</title>
<script type="text/javascript">
var attime;
function clock(){
var time=new Date();
atime=time.getHours()+"时"+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>
3回答
-
- 慕焚
- 2018-07-18 16:13:03
<!DOCTYPE HTML>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<title>定时器</title>
<script type="text/javascript">
var attime;
function clock(){
var time=new Date();
attime= time.getHours()+"时"+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>
-
- 小吕123
- 2018-08-28 11:24:56
其实是因为你赋值的变量名字不正确
-
- 慕焚
- 2018-07-18 16:14:03
细心一点哦
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