Present intrusion detection systems rapidly monitor MANETs environment, which leads rapid depletion of battery life to address this issue we propose a novel intrusion detection system for detecting black hole attack and gray hole attack which is based on table driven approach or voting process in which routing propose we use Ad hoc on demand routing protocol and on the basis of behavior of node we compute the vote for node and negative voting trunk the node from path nodes create secure path using highest vote number, in this work simulation done on ns-2.35, result shows that network performance increase by proposed methodology.