If your web app just can't tolerate a user clicking the back button, you can tell the browser to not cache the page. Most of the time it will listen if you use this code, which covers all the bases: Response.Expires = 60 Response.ExpiresAbsolute = DateAdd(DateInterval.Day, -1, Now()) Response.AddHeader("pragma", "no-cache") Response.AddHeader("cache-control", "private") Response.CacheControl = "no-cache"