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asp程序出错后，错误提示不是很清楚明白，让人摸不着头脑，用下面方法看看有没有帮助（此法目前只适合处ADO错误外的错误）
步骤一，用编辑器打开c:\winnt\help\iisHelp\common\500-100.asp
将它另存为500-101.asp备份(以便日后恢复）
步骤二，将下面的代码覆盖500-100.asp原文件，保存退出
步骤三，创建新文件test.asp，添加如下代码
<% response.write now(1)%>，存盘退出
步骤四，在浏览器中输入localhost/test.asp查看结果
500-100.asp的新代码：
<%@ language="VBScript" %>
<%
Option Explicit
Const lngMaxFormBytes = 200
Dim objASPError, blnErrorWritten, strServername, strServerIP, strRemoteIP
Dim strMethod, lngPos, datNow, strQueryString, strURL
If Response.Buffer Then
Response.Clear
Response.Status = "500 Internal Server Error"
Response.ContentType = "text/html"
Response.Expires = 0
End If
Set objASPError = Server.GetLastError
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html dir=ltr>
<head>
<style>
a:link {font:9pt 宋体; color:FF0000}
a:visited {font:9pt 宋体; color:#4e4e4e}
</style>
<META NAME="ROBOTS" CONTENT="NOindex">
<title>本页出错</title>
<META HTTP-EQUIV="Content-Type" Content="text-html; charset=gb2312">
<META NAME="MS.LOCALE" CONTENT="ZH-CN">
</head>
<script>
function Homepage(){
<!--
// in real bits, urls get returned to our script like this:
// res://shdocvw.dll/http_404.htm#http://www.DocURL.com/bar.htm
//For testing use DocURL = "res://shdocvw.dll/http_404.htm#https://www.microsoft.com/bar.htm"
DocURL=document.URL;
//this is where the http or https will be, as found by searching for :// but skipping the res://
protocolindex=DocURL.indexOf("://",4);
//this finds the ending slash for the domain server
serverindex=DocURL.indexOf("/",protocolindex + 3);
//for the href, we need a valid URL to the domain. We search for the # symbol to find the begining
//of the true URL, and add 1 to skip it - this is the BeginURL value. We use serverindex as the end marker.
//urlresult=DocURL.substring(protocolindex - 4,serverindex);
BeginURL=DocURL.indexOf("#",1) + 1;
urlresult=DocURL.substring(BeginURL,serverindex);
//for display, we need to skip after http://, and go to the next slash
displayresult=DocURL.substring(protocolindex + 3 ,serverindex);
document.write( '<A HREF="' + escape(urlresult) + '">' + displayresult + "</a>");
