AI movment script funtion start error ?

Hello,

I'm working on AI and i suck, wondering if you guys could help ? This is part of the Ai Movement script but I'm stuck with the function start part what do i put in the target = part i tried "Player" but it just gives me errors, what I'm i meant to put ?

 #pragma strict
 private var target : Transform;
 var waypoint : Transform;
 private var targetRotation : Quaternion;
 private var targetVector : Vector3;
 private var move : boolean = false;
 private var playerLastSeen : Vector3;
 private var visitedLastSeen : boolean = true;
 private var targetPriority : int = 0;
 
 private var curTarget : Vector3;
 
 var turnSpeed : float;
 var attackRange : float; 
 var targetBuffer : float;
 var desiredSpeed : float;
 var forceConstant : float;
 var viewAngle : float;
 var viewRange : float;
 var hearRange : float;
 
 function Start () {
     target = 
 }
 
 function Update () {
     if(MouseLookDBJS.freeze)
         return;
     var sees : boolean = CanSeeTarget();
     var relativePos : Vector3;
     if(sees){
         curTarget = target.position;
     } else if (!visitedLastSeen) { 
         curTarget = playerLastSeen;
     } else {
         if(waypoint) {
             curTarget = waypoint.position;
         } else {
             curTarget = Vector3(0,0,0);
         }
     }