if several variables is true then do function

the first thing worked for me thanks ;)

sorry for being unclear with the second question.

This is my enter turret script that i have attached to a collider.

 private var weaponCamera : GameObject;              // drag and drop player camera from Hierarchy to Inspector window!    
 var vehicleCam : GameObject;              
 var vehicleCameraTarget : Transform;  
 var vehicle : GameObject;   
 private var Player;  
 var GetOutPosition : Transform;                        // Empty game object, where player will get out of the vehicle    
 var VehicleControllScript: String = "ScriptName";       // Just write script name, which controls vehicle movement (controller script).      
 private var opened : boolean = false;  
 private var waitTime : float = 1;                       // leave it as 1   
 private var temp : boolean = false;  
 private var mainCamera : GameObject;  
 
 
 
 
 function Start () {
     Player = GameObject.FindWithTag("Player");         
     mainCamera = GameObject.FindWithTag("MainCamera");
     weaponCamera = GameObject.FindWithTag("WeaponCamera"); 
     vehicleCam.camera.enabled = false;
         vehicle.GetComponent(VehicleControllScript).TurretEnabled = false;
     vehicleCam.GetComponent(AudioListener).enabled = false;  
 }
 
 function Update() {
     if ((Input.GetKeyDown("e")) && opened && !temp){
         GetOut();
         opened = false;
         temp = false;
     }
 }
 
 function Action (){
     if (!opened && !temp){
         GetIn();
         opened = true;
         temp = true;
         yield WaitForSeconds(waitTime);
         temp = false;
     }
 }
 
 
 function GetIn() {
     var changeTarget : VehicleCamera = vehicleCam.transform.GetComponent("VehicleCamera");
     changeTarget.target = vehicleCameraTarget;
     Player.BroadcastMessage("LightOff");
     
     // Disable all script behaviours on Player (Essentially deactivating player control)
     var coms : Component[] = Player.GetComponentsInChildren(MonoBehaviour);
     for (var b in coms) {
         var p : MonoBehaviour = b as MonoBehaviour;
         if (p)
             p.enabled = false;
     }
     
     // Disable all renderers
     var gos = Player.GetComponentsInChildren(Renderer);
     for( var go : Renderer in gos){
         go.enabled = false;
     }
     
     Player.transform.parent = vehicle.transform;
     Player.transform.position = vehicleCameraTarget.transform.position;
     Player.rigidbody.isKinematic = true;
     Player.collider.isTrigger = true;
     weaponCamera.camera.enabled = false;
     weaponCamera.GetComponent(AudioListener).enabled = false;
     mainCamera.camera.enabled = false;
     vehicleCam.camera.enabled = true;
     vehicle.GetComponent(VehicleControllScript).TurretEnabled = true;
     vehicleCam.GetComponent(AudioListener).enabled = true;
 }
 
 
 function GetOut() {
     
     // Enable all script behaviours on Player (Essentially deactivating player control)
     var coms : Component[] = Player.GetComponentsInChildren(MonoBehaviour);
     for (var b in coms) {
         var p : MonoBehaviour = b as MonoBehaviour;
         if (p)
             p.enabled = true;
     }
     
     // Enable all renderers
     var gos = Player.GetComponentsInChildren(Renderer);
     for( var go : Renderer in gos){
         go.enabled = true;
     }
 
     Player.transform.parent = null;
     Player.rigidbody.isKinematic = false;
     Player.collider.isTrigger = false;
     Player.transform.position = GetOutPosition.transform.position;
     weaponCamera.camera.enabled = true;
     weaponCamera.GetComponent(AudioListener).enabled = true;
     mainCamera.camera.enabled = true;
     vehicleCam.camera.enabled = false;
     vehicleCam.GetComponent(AudioListener).enabled = false;
     vehicle.GetComponent(VehicleControllScript).TurretEnabled = false;
 }

here's my shooting script added inside the turret model (the barrel of it)

 var fireRate = 1.0;   
 var projectile : Rigidbody;  
 var speed = 20;  
 var crashSound : AudioClip;  
 private var nextFire = 0.0;  
 public var TurretEnabled : boolean;  
 
 function Update()
 {
     if (Input.GetButtonDown("Fire1") && (Time.time <= nextFire) && TurretEnabled) 
     { 
         nextFire = Time.time + fireRate; 
     } 
 
     if(Input.GetButton("Fire1") && (Time.time > nextFire) && TurretEnabled) 
     { 
         nextFire = Time.time + fireRate; 
 
         clone = Instantiate(projectile, transform.position, transform.rotation);
         clone.velocity = transform.TransformDirection( Vector3 (0, 0, speed));
         audio.PlayOneShot(crashSound);
         Destroy (clone.gameObject, 3);
     }
 }

how will i do so that the enter turret script changes the "TurretOn" boolean variable to on and off?

and changes the camera?