Bullet hit enemy

1

heya guys,
I have made a part of a game which makes the enemycome on the screen and you can shoot them but THEY DONT DIE!!! I need to know how to say hitTest when using arrays. The file is too big to attach but here is the code

var score = 0;
var enemyspeed = 5;
var shoot = true;
var bulletcount = 0;
var bulletarray = [];
var bulletspeed = 15;
var initialammo = 15;
var ammo = initialammo;
var ammotime = 0;
var ammodelay = 30;
function attachbullet() {
 if (Key.isDown(Key.SPACE) && shoot == true) {
  currentbullet = attachMovie("bullet", "bullet"+bulletcount, bulletcount);
  currentbullet._x = _root.char._x;
  currentbullet._y = _root.char._y;
  bulletcount++;
  shoot = false;
  bulletarray.push(currentbullet);
  ammo--;
 }
 if (Key.isDown(Key.SPACE)) {
  spaceup = false;
 } else {
  spaceup = true;
 }
 if (spaceup && ammo>0) {
  shoot = true;
 }
}
function movebullet() {
 for (var i = 0; i<bulletarray.length; i++) {
  bulletarray*._x += bulletspeed;
  var bullets = bulletarray*;
 }
}
var ammobaradd = initialammo*1000/ammodelay;
function checkammo() {
 if (ammo<0) {
  ammo = 0;
 }
 if (ammo == 0) {
  reload = true;
  ammotime++;
 }
 if (ammotime>=ammodelay) {
  ammo += initialammo;
  ammotime = 0;
 }
 if (reload == true) {
  _root.ammobar._xscale += ammobaradd-50;
 } else {
  _root.ammobar._xscale = ammo*1000;
 }
 reload = false;
}
var enemycount = 0;
var enemytimer = 0;
var enemydelay = 2*30;
var enemyarray = [];
var enemyleftboundary = 120;
function attachenemy() {
 enemytimer++;
 if (enemytimer>enemydelay) {
  currentenemy = attachMovie("enemy", " enemy"+enemycount, enemycount+1000);
  enemycount++;
  enemytimer = 0;
  currentenemy._x = 600;
  currentenemy._y = random(400);
  enemyarray.push(currentenemy);
  currentenemy._xscale = 200;
  currentenemy._yscale = 200;
 }
 if (currentenemy._y>350) {
  currentenemy._x = 350;
 }
 if (currentenemy._y<30) {
  currentenemy._x = 30;
 }
}
function moveenemy() {
 for (var e = 0; e<enemyarray.length; e++) {
  enemyarray[e]._x -= 2;
  if (enemyarray[e]._y<40) {
   enemyarray[e]._y = 40;
  }
  if (enemyarray[e]._y>350) {
   enemyarray[e]._y = 350;
  }
  if (enemyarray[e]._x<enemyleftboundary) {
   enemyarray[e]._x = enemyleftboundary;
   enemyarray[e].gotoAndStop(2);
  } else {
   enemyarray[e].gotoAndStop(1);
  }
  var enemies = enemyarray[e];
 }
}
var enemies = enemyarray[e];
var bullets = bulletarray*;
function checkcollision() {
 if (bullets.hitTest(enemies)) {
  enemies.removeMovieClip();
  ammo++;
 }
}
var wallhealth = 100;
function wall() {
 if (wallhealth<0) {
  wallhealth = 0;
 }
 _root.healthbar._xscale = wallhealth*100;
}
this.onEnterFrame = function() {
 attachenemy();
 checkammo();
 movebullet();
 attachbullet();
 moveenemy();
 checkcollision();
 wall();
};
stop();

Thanks in advance