sir i came to know that if iits want to change the eligibility,they announce it one year before...so as iits have not announced to change the criteria officially will the eligibility be changed for iitjee 2012????

As of now there is no update for any change in eligibility criteria for IIT -JEE and there is likely no sign of change in eligibility citieria for IIT-JEE 2012 and you will surely be updated if there woud be any updates regarding the same.