php sessions

[mrjameer 0]

hi,

i have a web page on which i put some radio buttons and when i click it, its value is displayed in textbox.when i click 2 radio,the 2 values will be addded and displayed in textbox[like shopping cart].

next if i click submit button it print's those values in second page and i want to take some user input on second page and then all the data will be stored in db.i did all this using sessions.it's working but when iam in second page,and when i click the browsers back button,to go to the radio buttons page and select some other options it is showing session has expired.how to solve this problem.

your help will be appreciated
thanks
mrjameer