“Funny Pages” opens this week, and if you’re looking to see something unconventional in both content and construction, then it just might be the ticket for you. A scene from “Poltergeist” comes to mind: when JoBeth Williams’s character asks her husband, played by Craig T. Nelson, to remember their days in college, when they were willing to try new things and were open to alternative experiences. In that spirit, “Funny Pages” is an exhilarating watch and, despite its occasionally confrontational weirdness, a worthy entry in the coming-of-age genre.