Hamish wrote:
Is it possible to check for the existence of a 3rd party cookie.
I.e. Check if a cookie has been set from Google, Lycos etc.
I know of no way to do this, mainly because I have never found it
necessary. Various combinations of my XP OS sp2 and various recent
browsers and security programs allow me to either reject setting of 3rd
party cookies or ask before they are set. If you want to detect 3'rd
party cookies already set on a browser viewing your page and report
this back to you, I doubt if this would be allowed, for security
reasons. It likely would involve a server side script such as php or
Perl. I would not say that this is impossible, because some hackers are
very clever, but the hack likely would be defeated as soon as OS and
browser makers found out about it.
