Aviod page reload when user hits back button

Hi
I got 2 coldfusion pages A and B. When i click a link from page A it goes to page B. When i click the back button of the browser from page B the page A refreshes and shows. I dont want the page A to reload when the user hits the back button of the browser (so that all data remains as it was) from page B.
is there any method to cache the page and show? Or are there any other methods? Pls help. I am running this project in Model Glue architecture (i dont know whether that makes any difference)