reports with variables on fiscal year and want to display the current fiscal period values

Hi

i wan to display the fiscal periods in one of the reports when i give input for fiscal year, let say i will pass the fiscal year  as 2012 , then i need to display the revenue for 2012.01,2012.02,2012.03,....2012.12 and in another selection i need to restrict the revenue with the previous year.

how can we achieve that.