Search in a String, spam in guestbook

[tobek275]

Hi, I have problems with spam in my guestbook and hope the solution colud be to forbid specific characters like "]" or maybe words like "www.".
So I need help to detect a special character or word in a string or more exact, in a string from a form(Request.form("text")).

Is there anyone who has another solution to be free from spam in guestbooks?

//Tobbe

[campkev]

you want the InStr function
example

blnOkToPost = true
if InStr(Request.form("text"), "www.") then blnOkToPost = false
if InStr(Request.form("text"), "]") then blnOkToPost = false

if blnOkToPost then
  'pseudocode
  '  post the submission
else
  'pseudocode
  'show error or whatever
end if