Weapon and enemy health

hey basically what i have is a weapon script and an enemy health script but when the object hits the enemys trigger it apllies the damage to every enemy with the script!!!Is there a way ii could do it were it only applies to the particular enemy it hits? thanks

weapon script

 function OnTriggerEnter( hit : Collider )
 
 {
   if(hit.gameObject.tag == "Enemy")
   {
   //subtract life here
   damageControl.LIVES -= damage;
   
     }
   
   }

enemy damage reciever script

 var Lives = 3;
 var explosion     : Transform;
 
 function Update ()
 {
  switch(Lives)
   {
     case 3:
 
     break;
 
 
     case 2:
 
     break;
     
     case 1:
  
     break;
     
     case 0:
     Destroy(gameObject);
     Instantiate(explosion, transform.Find("explode").transform.position, Quaternion.identity);
     break;
   
   }