getimage.asp
<% Option Explicit

Dim strBuffer, FilePath
strBuffer = Request.ServerVariables("HTTP_REFERER")
strBuffer = mid(strBuffer, InStr(strBuffer,".") + 1)
strBuffer = left(strBuffer, InStr(strBuffer, "/") - 1)

FilePath = "/HIDDENIMAGES/"

If strBuffer = "intels.net" then
FilePath = FilePath + Request.QueryString("FName")
Else
FilePath = "/images/chunfeng.jpg"
End If

Response.Redirect(FilePath)