Ok, but in case i choose the PHP solution, i suppose that two different content (one for the splash and one for the default home) in the same homepage will make trouble: if the url are the same and the content is dynamically changing Search Engine Bots wont be able to crawl correctly

Hi!

I need to add a splashpage to my wordpress site. I use "window.location" javascript on the homepage to redirect on the splashpage (controlled by cookie to redirect only for the first access).

Can this technique affect the SEO on homepage?

Thanks in advance!