I have a web page Test.aspx having two button of next and back on it. I redirect to this page (Test.aspx) from multiple pages. I want to define a flag that when i click to back button this page shuld be redirected to the respective page. For this purpose, i had used session but it didn't work out. Please guide me how can a define a flag to cope with situation like this. I am not allowed to use Query String there.