Help - I am in India running OSX10.8 and cannot access the web as y datacard requires Java

I just arrived in India. My internet access is by datacard as I am in a rural area. The datacard requests Java runtime 6. I downnloaded it from the net on another computer but cannot install it as it is a version that requires an earlier operating system. It does not seem there is a download for OSX 10.8. If anyone has any ideas about how I can install Java onto Mountain Lion without being connected to the net please help. I already tried to access it via Terminal but it just says not found.

thanks for your help.