What are the popular 'web-ready' functional programming languages?

Question

This is a simple question: what are the most popular/used/developed (libraries a plus) functional programming languages that are ready to be used for web development? I don\'t

Answer 1

This answer is partly in jest, but some people try their best to do functional programming in JavaScript:

http://osteele.com/sources/javascript/functional/
Javascript as a functional language

Using the same language on client and server has to count as a plus, even if the language isn't purely functional.