These are some good sites that you can use for your myth research.

http://www.bulfinch.org/

http://www.desy.de/gna/interpedia/greek_myth/greek_myth.html

http://www.mythweb.com/encyc/index.html

http://www.mythweb.com/index.html

http://web.uvic.ca/grs/bowman/myth/gods.html