<!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,h,m,s;
function clock(){
var time=new Date();
h=time.getHours();
m=time.getMinutes();
s=seconds.getSeconds();
var week=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
attime= h+":"+m+":"+s+":"+week[time.getDay()] ;
document.getElementById("clock").value = attime;
}
var int=setInterval(clock,100);
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
</form>
</body>
</html>还有就是我看了下这位同学的答案，为什么他的setInterval没有写间隔时间也可以运行，不是说必须要写的吗？
<!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,hh,mm,ss,ww,xx;
function clock(){
var time=new Date();
hh=time.getHours();
mm=time.getMinutes();
ss=time.getSeconds();
if(mm<10){hh="0"+mm};
if(hh<10){hh="0"+hh};
if(ss<10){ss="0"+ss};
var week=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]
ww=time.getDay()
xx=week[ww]
attime= hh+":"+mm+":"+ss+xx;
document.getElementById("clock").value = attime;
}
var int=setInterval(clock)
</script>
</head>
<body>
<form>
<input type="text" id="clock" size="50" />
</form>
</body>
</html>原来是s=seconds.getSeconds();写错了，，，找了一个小时……Dreamweaver也没有给我报错，郁闷，看来还是小细节没处理好