<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=big5">
<meta name="GENERATOR" content="Microsoft FrontPage 4.0">
<meta name="ProgId" content="FrontPage.Editor.Document">
<title>N 阶乘</title>
<script language="vbscript">
Sub xx()
num1 = document.test1.num1.value
If num1>=0 Then
document.test1.num2.value = Fact(num1)
Else
msgb ..
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