How to prevent re-submit of form when getting back to it?

How to prevent re-submit of form when getting back to it?

References

Reference NO 1

http://stackoverflow.com/questions/15189030/how-to-prevent-re-submit-of-form-when-getting-back-to-it

Reference NO 2

http://stackoverflow.com/questions/7747569/prevent-resubmit-form-after-click-back-button

Reference NO 3

http://www.getsymphony.com/discuss/thread/82658/2/

Reference NO 4

http://bjw.co.nz/developer/general/75-how-to-prevent-form-resubmission

Reference NO 5

http://css-tricks.com/forums/topic/php-prevent-form-re-submission/

Reference NO 6

http://tumblr.jonthornton.com/post/7902581999/preventing-form-re-submission-with-http-303-redirects

Reference NO 7

http://www.boutell.com/newfaq/creating/stoprefresh.html

Reference NO 8

http://bytes.com/topic/php/answers/714608-how-prevent-form-data-being-submit-when-page-refreshed