Inferface order in SuSE 9.1

My notebook computer has both an ethernet and WiFi interface built in. Normally, eth0 is the WiFi interface and eth1 is ethernet. However, occasionally, they are reversed, with WiFi on eth1 and ethernet on eth0. As this plays havoc with my scripts, I'd like to know if there's some way to either make it consistent, or at least be able to specify which device becomes which interface. tnx jk