battery pickup

public var raycastLength : int = 5; //How far away can you be to pick up the battery?
public var batteryIncrease : float = 1.0; //How much power do you get by one battery?
public var batteryObjectName : String = "Battery"; //Must be the same name as the battery in the scene or it won't work.

//Importing the "Player_Toggle_Flashlight"
public var flashlight : GameObject;
private var ptf_Script : Player_Toggle_Flashlight;

//Audio
public var mainPlayer : Transform;
public var pickupSound : AudioClip;

//Variables END

function Start()
{       //Get the script Player_Toggle_Flashlight
        ptf_Script = flashlight.GetComponent(Player_Toggle_Flashlight);
}

function Update()
{       //Pick up the battery
        BatteryPickup();
}
 //Function for picking up the battery
function BatteryPickup()
{       //If i press E, then something happens
        if(Input.GetKeyDown(KeyCode.E))
        {
                //Where will the ray start? Camera --> main --> ScreenPointToRay   vector3(3d)
                var rayOrigin = Camera.main.ScreenPointToRay(Vector3(Screen.width * 0.5, Screen.height * 0.5, 0.0));
                var hit : RaycastHit;
                //
                if(Physics.Raycast (rayOrigin, hit, raycastLength))
                {       //If Raycast hit the gameObject named batteryObjectName(Battery), refer to variables
                        if(hit.collider.gameObject.name == batteryObjectName)
                        {       //Then the var batteryLife inside the pft_script = batteryLife + batteryIncrease
                                ptf_Script.batteryLife += batteryIncrease;
                                //Then destroy the object
                                Destroy(hit.collider.gameObject);
                                //Then play the sound of pick up battery (pickupSound)
                                //audio.PlayClipAtPoint(pickupSound, mainPlayer.position);
                        }
                }
        }
}