Problem about targetting multiple enemies

Currently I am using the ObjectLabel script to put a targetting reticle over targets in my space simulation game. But it works for just 1 target. I want the targetting reticle appear over all targets around the player.

So I created sphere with a collision trigger and added this script:

private var targetList : Array = Array();

private var targetPosition : Vector3;

var targetReticle : GameObject;

function Start () {

}

function Update () {

}

function OnTriggerEnter (other : Collider) {
targetPosition = other.gameObject.transform.position;

 targetReticle.SendMessage("AddItem",targetPosition);
 
     //Sends the target's position to the TargetReticle GUITexture object

}

Then I modified the ObjectLabel script as follows:

var target : Transform; // Object that this label should follow

var offset = Vector3.up; // Units in world space to offset; 1 unit above object by default

var clampToScreen = false; // If true, label will be visible even if object is off screen

var clampBorderSize = .05; // How much viewport space to leave at the borders when a label is being clamped

var useMainCamera = true; // Use the camera tagged MainCamera

var cameraToUse : Camera; // Only use this if useMainCamera is false

private var cam : Camera;

private var thisTransform : Transform;

private var camTransform : Transform;

//CUSTOM VARIABLES

private var targetList : Array = Array(); //List of Targets are stored here

var arrayLenght : int; //Lenght of the target array

private var i : int = 0;

function Start () {

 thisTransform = transform;
 
 if (useMainCamera)
 
     cam = Camera.main;
 
 else
 
     cam = cameraToUse;
 
 camTransform = cam.transform;
 

}

function Update () { var arrayLenght = targetList.length;

 for(i = 0; i <= arrayLenght; i++)
 
 {
     Debug.Log("Value of i:"+i);
 
     Debug.Log("Position of the target:"+targetList[i]);
 
     Debug.Log("Array lenght:"+arrayLenght);
 
     if (clampToScreen) {
 
         var relativePosition = camTransform.InverseTransformPoint(targetList[i]);
 
         relativePosition.z = Mathf.Max(relativePosition.z, 1.0);
 
         thisTransform.position = cam.WorldToViewportPoint(camTransform.TransformPoint(relativePosition + offset));
 
         thisTransform.position = Vector3(Mathf.Clamp(thisTransform.position.x, clampBorderSize, 1.0-clampBorderSize),
                                          Mathf.Clamp(thisTransform.position.y, clampBorderSize, 1.0-clampBorderSize),
                                          thisTransform.position.z);
     }
 
     else {
 
         thisTransform.position = cam.WorldToViewportPoint(target.position + offset);
 
     }
 }

}

//CUSTOM FUNCTIONS HERE

function AddItem(item : Vector3) {

targetList.Add(item);

}

@script RequireComponent(GUIText)

The code actually does get all the targets in the dedection sphere BUT it only puts the reticle on the last object in the array. How do I change the code to keep the reticle on till the objects get destroyed?

Thanks.