class object remaing same data

[akshar108 via DotNetMonster.com]

I have problem regarding .net web application

when i start my application which is storing data in one class's variable
temporary and when in other page when i click save button then in last it is
stored in database i use this technique for back facility.
now my problem is that when i fill form and go in other page and start a new
web application in other web browser and fill up form and go to next page.
and in first browser when i click back button i got the information of last
open browser. can any one understand my problem and give me solution why this
things is done