When a visitors visits my site, I want them to have to visit the index page before they can visit the rest of the site. This needs to be done automatically. For instance, if they find my site via search engine, I want them to have to visit a certain page before they continue. Know where I can find this script in a library? Also, does this mess with SEO?
when a visitor comes to your site from search engine from a specific keyword to specific page of your site and you redirect him to index page the rank of that will page goes down and you will not be getting any traffic for that specific page again means overall your site traffic will be down...i suggest don't do that
Hmm, that's bad for SEO. Very bad. If you decide to do that, you'll end up with only one page in the search engines :S