Attack enemies in order

Hi everybody

I've written some new scripts and they work fine, but there's one problem. Strangly I can only attack the enemy which is first in my Hierarchy panel. After he's gone I can only attack the new first enemy in the Hierarchy panel and so on. These are my scripts, Attackscript is attached to the player and the other 2 to the enemies.

Attackscript:

 var distance = 10;
 var myobject : GameObject;
 var otherobject : GameObject;
 var mytransform : Transform;
 var othertransform : Transform;
 var cooldown : boolean = false;
 var activetexture : GUIStyle;
 var inactivetexture : GUIStyle;
 var usedtexture : GUIStyle;
 var enemyhealth : EnemyHealth;
 static var interval : float;
 
 
 function Start (){
 
 usedtexture = activetexture; 
 interval = 10;
 
 }
 
 function Update (){
 myobject = GameObject.FindWithTag("Player");
 otherobject = GameObject.FindWithTag("Enemy");
 mytransform = myobject.GetComponent(Transform);
 if(otherobject != null){
 othertransform = otherobject.GetComponent(Transform);
 enemyhealth = otherobject.GetComponent(EnemyHealth);
 }
 }
 
 function OnGUI (){
 
 if (GUI.Button (Rect(0,500,100,100),GUIContent("Attack"),usedtexture) && Vector3.Distance(mytransform.position, othertransform.position) < distance && enemyhealth.enemyhealth > 0 && cooldown == false){
 enemyhealth.enemyhealth -= 50;
 cooldown = true;
 Timer();
 }
 }
 
 
 
 function Timer (){
 
 if(cooldown == true){
 usedtexture = inactivetexture;
 yield WaitForSeconds(interval);
 cooldown = false;
 usedtexture = activetexture;
 }
 }

EnemyProximity:

 static var aggroDistance = 10;
 var mytransform : Transform;
 var otherobject : GameObject;
 var othertransform : Transform;
 var glitchCorrector : boolean = true;
 var tickerInterval : boolean = false;
 var tickerRate = 5.0;
 private var nextTick = 0.0;
 static var seppuku : boolean = false;
 var enemyhealth : EnemyHealth;
 var enemyproximityhealth : int;
 
 function Awake (){
 mytransform = gameObject.GetComponent(Transform);
 otherobject = null;
 othertransform = null;
 enemyhealth = null;
 }
 
 function Update () {
 
 if (ClassSelectionScript.classselected == true && otherobject == null && othertransform == null ){
 otherobject = GameObject.FindWithTag("Player");
 othertransform = otherobject.GetComponent(Transform);
 enemyhealth = gameObject.EnemyHealth;
 }
 
 if (othertransform != null && Vector3.Distance(mytransform.position, othertransform.position) < aggroDistance && glitchCorrector == true){
 ArcherHealthScript.curhealth += 10;
 WarriorHealthScript.curhealth += 10;
 MageHealthScript.curhealth += 10;
 glitchCorrector = false;
 }
 
 if (othertransform != null && Vector3.Distance(mytransform.position, othertransform.position) > aggroDistance && glitchCorrector == false){
 glitchCorrector = true;
 }
 
 if(othertransform != null && Vector3.Distance(mytransform.position, othertransform.position) < aggroDistance && tickerInterval == false && HealthScript.curhealth > 0){
 ArcherHealthScript.curhealth -= 10;
 MageHealthScript.curhealth -= 10;
 WarriorHealthScript.curhealth -= 10;
 tickerInterval = true;
 }
 
 if(tickerInterval == true && Time.time > nextTick){
 nextTick = Time.time + tickerRate;
 tickerInterval = false;
 }
 }

EnemyHealth:

 var enemyhealth : int = 100;
 var enemyproximityobject : GameObject;
 var enemyproximity : EnemyProximity;
 var drop : GameObject;
 
 function Start (){
 enemyproximityobject = gameObject;
 enemyproximity = enemyproximityobject.EnemyProximity;
 }
 
 function Update (){
 if(enemyhealth <= 0){
 seppuku = true;
 Destroy(gameObject);
 var instance : GameObject = Instantiate(drop, transform.position+Vector3(0,0.2,0), transform.rotation);
 ExperienceScript.curexp += 10;
 }
 }

I think there's a problem with .FindWithTag. How can I tell Unity that I want ALL the objects with the tag Enemy?

Please help me!