U have to get an NOC (No Objection Certificate) from ur present employer. Since ur joining date is May 2007, it seems that, ur still on ur probation period. If u terminate ur employment when ur on probation period, u will have to pay the chagers that occured for ur job to ur current emplyer. Besides, NOC depends on ur employers decission. He may or maynot give an NOC.

There are two type of NOC's. One type allows u to re-enter with an immediate effect but will not be allowed to work anywere for two years. The second one allows u to work anywhere without any prob.

So while getting the NOC, throughly read the contents. Don't be in trouble. Gud Luck..