What code should I Put? ontriggerenter

hi experts!
I am Planning to move my cam if ontriggerEnter collide, and it does…
Now if I go OntriggerExit it still Move the cam after 3 sec… I want to not move the cam if OntriggerExit but what code should i put in…

here is my code thanks in advance…

var mainCam:GameObject;
var waitSeconds = 3;
var thisObj:Vector3;

function Start(){
	thisObj = transform.position;
}
function OnTriggerEnter(Other : Collider){
	 Debug.Log("Enter Collider");
	 yield WaitForSeconds (waitSeconds); 
	 if (Other.gameObject.name.StartsWith("Crosshair")) {
   	 	iTween.MoveTo(mainCam,thisObj,2);
	}   	 
}
function OnTriggerExit (Other : Collider){
 	Debug.Log("Exit Collider");
 	yield WaitForSeconds (waitSeconds);
	
	//THIS WHAT CODE SHOULD I PUT?

}

iTween.Stop(gameObject);