Attack Script problem please help

My Problem is that i need to acces PlayerDamage.cs with the ZombieDamage.js as when the folowing script runs my hp drops im new to scripting and i cant understand the logic between those two c# to c# i can understand but java to c# its more complicated for mee

 var maximumHitPoints = 100.0;
 var hitPoints = 100.0;
 var deadReplacement : Rigidbody;
 var GOPos : GameObject;
 
 private var ikilled = false;
 
 function Start(){
 
     
 }
 
 function ApplyDamage (damage : float) {
     if (hitPoints <= 0.0)
         return;
 
     // Apply damage
     hitPoints -= damage;
     
     // Are we dead?
     if (hitPoints <= 0.0)
     {
         ikilled = true;
         Replace(); 
         //tell the networkplayer imdead
         networkView.RPC("tellimdead", RPCMode.All);
     }
 }
 
 function Replace() {
  
     // If we have a dead barrel then replace ourselves with it!
     if (deadReplacement) {
         var dead : Rigidbody = Instantiate(deadReplacement, GOPos.transform.position, GOPos.transform.rotation);
         
         // For better effect we assign the same velocity to the exploded barrel
         dead.rigidbody.velocity = rigidbody.velocity;
         dead.angularVelocity = rigidbody.angularVelocity;
     }
     // Destroy ourselves
     Destroy(gameObject);
 }
 
 @RPC
 function tellimdead()
 {
 //the networkplayer shouldn't get our score
 ikilled = false;
 Replace();
 }






 
 
 
 
 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class PlayerDamage : Photon.MonoBehaviour {
     
     public GUISkin guiSKin;
     //Player health
     public float hp = 100;
     public GameObject ragdoll;
     public Texture2D bloodyScreen;
     public Texture2D hitMarkTexture;
     //Hitboxes and damage properties for each
     [System.Serializable]
     public class HitBoxes { 
         public Collider box /*{ get; set; } */;
         public float damage /*{ get; set; }*/;
         
         public HitBoxes(Collider box1, float damage1){
             box = box1;
             damage = damage1;
         } 
 
     } 
     public List<HitBoxes> hitBoxes = new List<HitBoxes>(); 
     
     [HideInInspector]
     public float currentHp;
     Quaternion camRot;
     Quaternion camDefaultRotation;
     //Fade hit mark
     float fadeValue;
     //Fade bloody screen
     float fadeValueB;
     
     void Awake(){
         camDefaultRotation = Camera.main.transform.localRotation;
         currentHp = hp;
         if(!photonView.isMine){
             for(int i = 0; i < hitBoxes.Count;i++){
                 hitBoxes[i].box.gameObject.AddComponent<HitBox>();
                 hitBoxes[i].box.gameObject.GetComponent<HitBox>().maxDamage = hitBoxes[i].damage;
                 hitBoxes[i].box.gameObject.GetComponent<HitBox>().playerDamage = this;
                 hitBoxes[i].box.isTrigger = true;
             }
         }else{
             for(int a = 0; a < hitBoxes.Count;a++){
                 //We dont need our hit boxes, destroy them
                 Destroy (hitBoxes[a].box.collider);
             }
             hitBoxes.Clear();
         }
     }
     
     public void totalDamage(float damage){
         fadeValue = 2;
          photonView.RPC("doDamage", PhotonTargets.All, damage);
         if(weKilled){
             
             GameObject.FindWithTag("Network").SendMessage("AddKillNotification", gameObject.name, SendMessageOptions.DontRequireReceiver);
         }
     }
     
     bool weKilled;
     
     [RPC]
     void doDamage(float damage){
         if(weKilled)
             return;
         if(currentHp > 0 && photonView.isMine){
             this.StopAllCoroutines();
              StartCoroutine(doCameraShake());
         }
         
         fadeValueB = 2;
 
         currentHp -= damage;
         
         //We got killed
         if(currentHp < 0){
             GameObject temp;
             temp = Instantiate(ragdoll, transform.position, transform.rotation) as GameObject;
             
             gameObject.SetActiveRecursively(false);
             gameObject.active = true;
             
             if(photonView.isMine){
                 print ("We got killed");
                 
                 foreach(PhotonView p in transform.GetComponentsInChildren<PhotonView>()){
                     PhotonNetwork.RemoveRPCs(p);
                 }
                 temp.SendMessage("RespawnAfter");
 
                 StartCoroutine(photonDestroy());
             }else{
                 temp.SendMessage("clearCamera");    
             }
             currentHp = 0;
             weKilled = true;
         }
     }
     
     IEnumerator photonDestroy(){
         yield return new WaitForSeconds(0.1f);    
         PhotonNetwork.Destroy(gameObject);
     }
     
     void OnGUI(){
         //Display HP for our player only
         if(photonView.isMine){
             GUI.skin = guiSKin;
             GUI.color = new Color(1,1,1,0.9f);
             GUI.depth = 10;
             GUI.color = new Color(1,1,1,fadeValueB);
             GUI.DrawTexture(new Rect(0, 0, Screen.width, Screen.height), bloodyScreen, ScaleMode.StretchToFill );
             GUI.color = new Color(1,1,1,0.9f);
             //Display player hp
             GUI.Box (new Rect (Screen.width - 220,Screen.height - 55,100,45), "HP | " + (int)currentHp);
         }else{
             GUI.color = new Color(1,1,1, fadeValue);
             GUI.DrawTexture(new Rect(Screen.width/2 - 13, Screen.height/2 - 13, 26, 26), hitMarkTexture, ScaleMode.StretchToFill );    
         }
     }
     
     IEnumerator doCameraShake(){
         //Change shake amount here (Currently its 10)
         camRot = Quaternion.Euler (Random.Range(-10, 10), Random.Range(-10, 10), 0);
         yield return new WaitForSeconds(0.1f);
         camRot = camDefaultRotation;
     }
     
     void Update(){
         fadeValue = Mathf.Lerp(fadeValue, 0, Time.deltaTime*2);    
         fadeValueB = Mathf.Lerp(fadeValueB, 0, Time.deltaTime*2);
         //Do camera shake effect
         if(Camera.main)
             Camera.main.transform.localRotation
 = Quaternion.Slerp(Camera.main.transform.localRotation, camRot, Time.deltaTime * 15); 
     }
 }