ai navigation help

i am making a ai that will go to a 10 different objects but it keeps stopping at the second one the script is not finished but i programmed it to go to the first second and third but it wont go to the third one this is what i wrote.Note: target1 and objecttarget1 is the same just in different form

 #pragma strict
 
 var target1 : Transform;
 var target2 : Transform;
 var target3 : Transform;
 var target4 : Transform;
 var target5 : Transform;
 var target6 : Transform;
 var target7 : Transform;
 var target8 : Transform;
 var target9 : Transform;
 var target10  : Transform;
 private var NavComponent : NavMeshAgent;
 var monster : GameObject;
 var objecttarget1 : GameObject;
 var objecttarget2 : GameObject;
 var objecttarget3 : GameObject;
 var Target4 : GameObject;
 var Target5 : GameObject;
 var Target6 : GameObject;
 var Target7 : GameObject;
 var Target8 : GameObject;
 var Target9 : GameObject;
 var Target10  : GameObject;
 
 
 function Start () 
 {
     NavComponent=this.transform.GetComponent(NavMeshAgent);
     NavComponent.SetDestination(target1.position);
 }
 
 function Update () 
 {
     NavComponent.SetDestination(target2.position);
     
     if(objecttarget2.active == false)
     {
         NavComponent.SetDestination(target3.position);
     }
 
             
 }
 
 function OnTriggerEnter(other : Collider)
 {
     if(other.gameObject.tag == "myflag")
         {
             other.gameObject.SetActive(false);
         }
 }