Comic book scripts; resources and advice

I am building the concept of an anthropomorphic costume hero universe that I thought would make a great series of novels. Someone else advised me that they would be more likely to sell as a graphic novel. I've already posted an excerpt from my work on my page. Now, I'm going to write and post a brief comic book script for my story on this website in the near future (2-4 pages, no more).

Just one problem though; I've not actually tried writing a comic book script before! I know how they should look, but there's a good chance mine may be unclear to a potential artist or lack finesse.

Can anyone offer any good advice on writing a comic book script, or direct me to any good information resources on writing one? This may be books, magazines or websites, but bear in mind I live in the UK and might not have access to certain printed material.