c#help reversing a script

i want to revers my script it removed health but i cant seem to revers it the add health take make a game character heal

this is the script im trying to change

Healer script

///
/// Healer.cs
/// Oct 20, 2010
///
/// This is a very basic Mob Attack script that we are going to use to get use to coding in C# and Unity
///
/// This script is ment to be attached to a healer character, or healer character prefab
///
using UnityEngine;
using System.Collections;

public class Healer : MonoBehaviour {
public GameObject target;
public float attackTimer;
public float coolDown;

public string playertarget;

// Use this for initialization
void Start () {
	attackTimer = 0;
	coolDown = 2.5f;
	
	target = GameObject.FindGameObjectWithTag("Player");
}

// Update is called once per frame
void Update () {
	if(attackTimer > 0)
		attackTimer -= Time.deltaTime;
	
	if(attackTimer < 0)
		attackTimer = 0;
	
	if(attackTimer == 0) {
		Attack();
		attackTimer = coolDown;
	
	}
}

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);
	
	if(distance < 2.5f) {
		if(direction > 0) {
			PlayerHealth eh = (PlayerHealth)target.GetComponent("PlayerHealth");
			eh.AddjustCurrentHealth(-10);
		}
	}
}

}

i have tried a bunch of things that seem like it should work but dose not work any suggestions

if this function “AddjustCurrentHealth()” is working maybe you should try a positive value to it.

eh.AddjustCurrentHealth(10);