trying to get the game to run on mac

i used to play supremacy but quit 4 months ago after a hard drive crash. im trying to come back but i cant get around the java installation/run this time. ive tried chrome and safari. ive downloaded several different versions of java but nothing seems to work.

im using the same computer as always (macbook pro) only difference is the new operating system (10.7.5)

anyone know how to help me?