Script to check if visitor is a search engine

[mattglet]

I'm looking to create some reports for myself on a few sites, especially one that logs non-search engine visits. Does anyone have a "good" script that checks to see if the user is any kind of search engine?

I know I could make a simple one myself, but I'm looking to hit a home run right off, and possibly use someone else's that's a little more powerful from the get-go.

I would assume it would consist of a bunch of InStr() checks. Anyone have something advanced?

-Matt

[Easy_Coder]

I typically log everything into sql server tables and then write my sprocs to pull this type of data by filtering on the user_agent_type.