For the purpose I this question I have created a simple html file with a textbox. Lets say I enter a string in the text box and submit the form. Now when I click back button and return to the page the string is still there and no matter how many times I click refresh button it wouldn't clear. Also I mustn't use the reset button because it cause problem in real script. By the way, I have already set the browser to check for the "newer version of the page every time I visit the page."
The only way to obmit this is to name fields differently every impression (ie using php random and adding hidden field with the name) It's good solution in my opinion if you know basics of php
Setting your own browser to find a new version of the page every time wont help anyone but yourself to get past the problem. How does reset cause a problem in 'real' script?? Think we'd all need more details to help further!