Function ShowFolderSize(filespec)  
Dim fso, f, s  
Set fso = CreateObject("Scripting.FileSystemObject")  
Set f = fso.GetFolder(filespec)
s = UCase(f.Name) & " 大小为 " & f.size & " 字节。"
ShowFolderSize = s 
End Function

Dim fso
Set fso = CreateObject("Scripting.FileSystemObject")
f1="d:\webroot\news.html"
f2="d:\webroot2\news.html"
fsize=3000
set fn2=fso.GetFile(f1)
flsize2=fn2.size
fldate2=fn2.datelastmodified
set fn=fso.GetFile(f2)
flsize1=fn.size
fldate1=fn.datelastmodified
If fso.FileExists(f1) and flsize2>fsize and fldate2>fldate1 Then
fso.getfile(f1).copy(f2)
if err.number=0 then WriteHistory "成功"&now()&".........","log.txt"
end if

Sub WriteHistory(hisChars, path)
 Const ForReading = 1, ForAppending = 8
 Dim fso, f
 Set fso = CreateObject("Scripting.FileSystemObject")
 Set f = fso.OpenTextFile(path, ForAppending, True)
 f.WriteLine hisChars 
 f.Close
End Sub