MOB HP - Subtract on Hit if Near

I have two scripts.. Player Attack and AttackandHP (Placed on Enemies) Now the AttackandHP shows my enemies health and also attacks the player. Ive got the Mobs to take my life away fine, how ever, i want to have it so my mobs could either be selected on click, or so you can press F and any mobs near you will lose HP. Im stuck and the Player Attack script does not effect my mobs at all because they require a target but im lost. Any help please!

AttackandHP using UnityEngine; using System.Collections;

 public class AttackandHP : MonoBehaviour {
     public int maxHealth = 10;
     public int curHealth = 10;
 
     public GameObject target;
     public float attackTimer;
     public float coolDown;
     public GUIStyle HPBar; //GUISTYLE FOR BUTTONS ETC
 
         public float healthBarLength;
 
 
     // Use this for initialization
     void Start () {
 
     healthBarLength = Screen.width / 2;
     
     attackTimer = 0;
     coolDown = 2.0f;
     }
     
     // Update is called once per frame
     void Update () {
 
         //TEST
 
 
         //TESTEDN
     AdjustCurrentHealth(0);
     
     if(attackTimer > 0)
             attackTimer -= Time.deltaTime;
             
         if(attackTimer < 0)
             attackTimer = 0;
             
         if(attackTimer == 0) {
             Attack();
             attackTimer = coolDown;
             }
         
     }
     
     void OnGUI() {
     float distance = Vector3.Distance(target.transform.position, transform.position);
 
         Debug.Log(distance);
         
         if(distance < 4) {
     GUI.Box(new Rect(10, 40, healthBarLength, 20), curHealth + "/" + maxHealth, HPBar);
 }
     }
     
     public void AdjustCurrentHealth(int odj) {
     curHealth += odj;
     
     if(curHealth < 1)
         curHealth = 0;
         
     if(curHealth > maxHealth)
         curHealth = maxHealth;
         
     if(maxHealth < 1)
         maxHealth = 1;
     
     if(curHealth == 0)
         Destroy (gameObject);
         
     healthBarLength = (Screen.width / 2 ) * (curHealth / (float)maxHealth);
     }
     
     private void Attack() {
         float distance = Vector3.Distance(target.transform.position, transform.position);
         
         Vector3 dir = (target.transform.position - transform.position).normalized;
         
         float direction = Vector3.Dot(dir, transform.forward);
 
         Debug.Log(direction);
         
         if(distance < 2) {
             if(direction > 0) {
         PlayerHealth eh = (PlayerHealth)target.GetComponent("PlayerHealth");
         eh.AdjustCurrentHealth(-8);
         
         }
         }
     }
 }

Player Attack using UnityEngine; using System.Collections;

 public class PlayerAttack : MonoBehaviour {
     public GameObject target;
     public float attackTimer;
     public float coolDown;
     
     // Use this for initialization
     void Start () {
         attackTimer = 0;
         coolDown = 2.0f;
     }
     
     // Update is called once per frame
     void Update () {
 
         if(attackTimer > 0)
             attackTimer -= Time.deltaTime;
             
         if(attackTimer < 0)
             attackTimer = 0;
             
     //attack press F key
         if (Input.GetKey (KeyCode.F)) {
         if(attackTimer == 0) {
                 animation.Play("bitchslap");
             Attack();
             attackTimer = coolDown;
             }
         }
     
         
 
     }
 
 
     // CHANGE TO HIT NEAREST ENEMY?? IDK HOW MAN!!!
     private void Attack() {
 
         AttackandHP eh = (AttackandHP)target.GetComponent("AttackandHP");
         eh.AdjustCurrentHealth(-2);
 
 
     }
 }