<html>
<head>
<title>factor!!!!</title>
<script language="JavaScript">
function factor(num)
{var i, fact=1;
for (i=1;i<=num;i++)fact=i*fact;
return fact;
}
</script>
</head><body>
<p><script>
ducument.write("调用函数5的阶层为：",factor(5),"。");
</script></p>
</body>
</html>
--------------------------------------------------------------看了几遍，不知道哪错了，求教。谢谢。
<head>
<title>factor!!!!</title>
<script language="JavaScript">
function factor(num)
{var i, fact=1;
for (i=1;i<=num;i++)fact=i*fact;
return fact;
}
</script>
</head><body>
<p><script>
ducument.write("调用函数5的阶层为：",factor(5),"。");
</script></p>
</body>
</html>
--------------------------------------------------------------看了几遍，不知道哪错了，求教。谢谢。
------------------------------------------------------->
document.write("调用函数5的阶层为："+factor(5)+"。");
将ducument换成document