Web design

Hey, I'm looking to learn web design, but i have no idea what language to learn.

The only prior programming experience i have is the first 100 pages of a C# book.

What language(s) should i learn and what book(s) should i purchase?

Haskell question:

In haskell-mode, emacs, C-c C-l invokes ghci in a separate window. How do I load it in the vertically split frame window rather than horizontally?