i have design a login page...
when the user has accessed the page, there will have a "logout" button...but when i tried to logout from the page, and then i clicked on the back button, it will bring me back to the previous page!
what i want is that when the user has logged out, and then when they click the back button, the page will say:
"YOUR SESSION HAS ENDED,PLEASE LOGIN AGAIN"

can anybody help me