melee attack with raycast

hey, im trying to make a melee attack script, and for this im using a raycast from the camera to in the direction it is pointing. anyway i cant figure out how to meke the ray go in the direction the camera is pointing. here is the script im using:

 #pragma strict
 //ray
  var distance : int = 3; 
  var target : Transform;
  var direction : Transform;
 //attack 
  var damage : int;
  var canAttack : boolean;
  var maxDistance : int;
  var currDistance : Vector3;
  
  var currAngle : Quaternion;
  var minAngle : Vector2;
  var maxAngle : Vector2; 
 //health bar
  var healthBarSize : Vector2;
  var ennemyHealth : health;
    
 function Start (){
  Screen.lockCursor = true;
 }
   
 function Update (){
 // detect the target 
  var hit : RaycastHit; 
  var ray : Ray;
  
    if (Physics.Raycast(transform.position, /*(here idk what to do)*/, hit, distance)){
      target = hit.transform;
    }
    else{
     target = null;
    }
 
 //get enemy health
    if (target != null){
     ennemyHealth = target.GetComponent("health");
     healthBarSize.x = ennemyHealth.health;
    }
  
 //damage target 
    if (Input.GetButtonDown("Fire1") && canAttack){
     target.SendMessage("Damage",damage,SendMessageOptions.DontRequireReceiver);
    }
 }
 
 function OnGUI (){
  if (target != null && target.tag == "living"){
   GUI.Box(Rect(10 , 20, healthBarSize.x, healthBarSize.y), "health");
  }
 }

also, if you thing there is a better way pleas let me know, thanks!