Eligibility to claim investments under sec 80c etc..

Hello all,

Can a employee claim the investments/housing loan repayments(Principal+interest) made by him prior to joining his employer in the same financial year, e.g if an insurance premium was paid by the employee in May 2011, and he has joined the employer in July 2011. Is he eligible for the amount of premium paid in May 2011 for A.Y 2012-13? Please also provide any source, if available.

Regards,