ControllerColliderHit qusition

I want to hit the enemy 3 times to destroy ~ I changed the code that does not work Can ask the experts tell me why?

function OnTriggerEnter(hit:ControllerColliderHit) {

        if(hit.gameObject.tage("enemy")) {
             if(hit == true*3) 
             Destroy(gameObject);
             }

       }

I change my scrpit. I want to hit the enemy 3 times to destroy.

private var hitCount = 0;

function OnCollisionEnter(collision : Collision)
{
     if(collision.gameObject.CompareTag ("enemy")) 
     {

         hitCount +=1;

    }

    if(hitCount == 3)
   {
   Destroy(gameObject);
   }

}

If you want to do it right then:

var hitCount = 0;

function OnTriggerEnter(hit : Collider)
{
if(hit.gameObject.tag == "enemy")
   {
   hitCount +=1;
   }

if(hitCount == 3)
   {
   Destroy(hit.gameObject);
   }

}