my script not working..!!!

hi guys…please help me…i try to use this script for open the door … but its not working… i made animation for door and its work…but this not working…please helppppp !!!

var RayCastLenght = 5;
function update()

  var hit: RaycastHit; 
     //check if we colloding

if(Physics.Raycast(transform.position, transform.forward, hit, RayCastLenght)) {

                    //...with a door

if(hit.collider.gameObject.tag == “door”) {

                     //open the door

hit.collider.gameObject.animation.Play(“open door”);

Do you have a collider on the door?