Using back button to clear data

I have a several JSP pages that help create a report. The first page you choose some options using check boxes. The second page you put those options in a certain order. The last page you choose the data you want to search for and it runs the report. The second and the last pages have a back button. The problem is when you use the back button and change some of your choices the old choices don't always go away. What I need to do is erase the previous choice (which are contained in an array) when the back button is clicked.

One problem is that the array is declared in a different method than the one that determines what happens when the back button is pressed.

[681 byte] By [smithy4282a] at [2007-11-26 19:19:45]