<%
Const DEVJS_INDEX="index.html"
Const INDEX_DEFAULT_INTERVAL=300
Dim sLastUpdate
'用Application保存最后更新的时间，而在页面里做判断，每隔300秒(5分钟)就生成一次页面
sLastUpdate=Application("INDEX_LAST_Update")
If sLastUpdate="" or DateDiff("s",sLastUpdate,now())>INDEX_DEFAULT_INTERVAL Then
'调用MakeIndex()生成页面,同时更改最后更新时间
MakeIndex()
sLastUpdate=Now()
Application("INDEX_LAST_Update")=sLastUpdate
Response.Write "超出默认时间，更新于" & sLastUpdate
Else
Response.Write "读取静态页面，更新于" & sLastUpdate
End If
Response.Write LoadTextFile(Server.MapPath(DEVJS_INDEX),"GB2312")
Function MakeIndex()
sContent="<hr>" & Now()
Call SaveTextFile(Server.MapPath(DEVJS_INDEX),"GB2312",sContent)
End Function
%>

<%
Function LoadTextFile(sFilePath,sCharset)
Dim oStream
Set oStream=Server.CreateObject("ADODB.Stream")
oStream.Type=2
oStream.Mode=3
oStream.Open
oStream.Charset=sCharset
oStream.Position=oStream.Size
oStream.LoadFromFile sFilePath
LoadTextFile=oStream.ReadText
oStream.Close
Set oStream=Nothing
End Function
Function SaveTextFile(sFilePath,sCharset,outString)
SaveFile=false
Dim oStream
Set oStream = Server.CreateObject("ADODB.Stream")
oStream.Type=2
oStream.Mode=3
oStream.Open
oStream.Charset=sCharset
oStream.WriteText = outString
oStream.SaveToFile sFilePath,2
oStream.Close
Set oStream = Nothing
SaveTextFile=true
End Function
%>