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Hidden form controls remain part of any form, but the user cannot see them in the Web browser. They should not be used for any sensitive information you do not want the user to see because the user could see this data if she looked in the source of the page.
Following hidden form is being used to keep current page number. When a user will click next page then the value of hidden form will be sent to the back-end application and it will decide which page has be displayed next.
This is page 10
This will produce following result: