Cookie Detection

I'm going to go down this route of Cookie detection

<%

If Request.Querystring("Check") = "" Then

Session("cookietest") = "True"

Response.Redirect("cookietest.asp?Check=True")

Else

If Session("cookietest") Then

<!-- Execute code if enabled -->

Else

<!-- Execute code if disabled -->

End If

End If

%>

I’m a little worried, do you know how spiders work with regards to this sort of thing? My site gets some traffic due to it being spidered by the likes of google and I don’t want to loose that flow.

If I use this at the entry point of my site to redirect browsers with cookies turned off to a page telling them to turn them on will that stop the spiders?