AI - Follow player

Hey!
I have been working on an basic AI for a week now and I am stuck with trying to make the enemy follow the player.
Here is the code that isn’t working:

private var playerPos;
private var objectFollow;

function Start(){
	objectFollow = GameObject.FindWithTag("Player");
}

function Update(){

if(GUITest.taBortOk == true && GUITest.pausKnapp == false){
	if(continueChase == true){
		
		Vector3 playerPos = new Vector3(objectFollow.position.x, this.transform.position.y, objectFollow.position.z);
	
	this.transform.LookAt(playerPos);
}
}

I get an expected semicolon message at: Vector3 playerPos = new Vector3(objectFollow.position.x, this.transform.position.y, objectFollow.position.z);
I am trying to limit the AI so it doesn’t follow me up in the air if I for example jump, therefor using the this.transform.position.y

You don’t have to worry about the if-statements, they are working fully, the problem is just the playerPos.
Any help would be much appreciated!!

private var objectFollow;

private var continueChase : boolean = false;

private var playerPos : Vector3;



function Start(){
    objectFollow = GameObject.FindWithTag("Player");
}



function Update(){

if(GUITest.taBortOk == true && GUITest.pausKnapp == false){
    if(continueChase == true){


    playerPos = Vector3(objectFollow.transform.position.x, this.transform.position.y, objectFollow.transform.position.z);

    this.transform.LookAt(playerPos);


       transform.Translate(Vector3(0,0,Time.deltaTime * 8));
    }
}

//follow();
if(GUITest.taBortOk == true && GUITest.pausKnapp == false){
if(continueChase == false){
transform.Translate(Vector3(0, 0, Time.deltaTime * 3));
transform.Rotate(Vector3(0,Time.deltaTime * 3));
}
}

var hitRay : RaycastHit;
    Debug.DrawRay(transform.position,transform.forward * 500, Color.green);
    Debug.DrawRay(transform.position,transform.right * 500, Color.red);





if(GUITest.taBortOk == true && GUITest.pausKnapp == false){ 
    if(Physics.Raycast(transform.position, transform.forward,hitRay, 10)){
       var   objectHit : GameObject = hitRay.collider.gameObject;
       if(objectHit.tag == "Player"){
          continueChase = true;
          }
       }
       }


       if(GUITest.taBortOk == true && GUITest.pausKnapp == false){
       if(Physics.Raycast(transform.position,transform.forward, hitRay, 5)){

         if(objectHit.tag == "TerrainCollision" || objectHit.tag == "Target" || objectHit.tag == "Moveable" 
         || objectHit.tag == "Wall"){
         continueChase = false;

          transform.Rotate(0,Time.deltaTime * 10 + 25,0);

          }

         else{


         }

         }


}
}