怎样防止网页的内容被别人采集

<%
'****************************************
' 怎么防止网页的内容被别人采集,非法的访问你的网站
'****************************************
dim onlyURL,from '***指定来源网址...
onlyURL="http://127.0.0.1/"
from=trim(request.serverVariables("HTTP_REFERER"))
if from="" then '***来源为空:可能是直接输入网址或小偷...
response.write "<div style=’display:none’><p>拒绝小偷!!!"
response.write "<p>来自:" & from
response.write "<p>请访问:<a href='" & onlyURL & "'>" & onlyURL &"</a>"
response.write "<p><form name=’blankForm’ method=get action=’’></form>"
response.write "<p><script language=""JavaScript"">blankForm.submit()</script>" & vbCRLF
response.end
else
if inStr(from,onlyURL)<>1 then
' ***非指定来源:盗链...
response.write "<div style=’display:none’><p>拒绝盗链!!!"
response.write "<p>来自:" & from
response.write "<p>请访问:<a href=’" & onlyURL & "’>" & onlyURL &"</a>"
response.write "<p><form name=’blankForm’ method=get action=’’></form>"
response.write "<p><script language=""JavaScript"">blankForm.submit()</script>"
response.end
else '***来源正常,将访问后面的内容...

end if
end if
%>