How to set no cach in rails?

Dear all,

I have been using ajax concept in my application, as the updates are not
made properly, and once i clear cache in firefox and temporary internet
files in IE& iam getting the reult properly.

So i have decided not to set cache, i mean the pages should not be
stored in cache or temporary internet files. This would solve the issue
in my task.

So could any one please suggest on how to use in my rails program that
my pages should not be stored in any browser?

Thanks in advance