敵が破壊される

http://home.h00.itscom.net/toku/jsexample/enemy/enemy.html

<body onload="sampleMain()">

<script language="JavaScript">

function sampleMain(){
  enemyPattern = 0;
  setInterval("changeEnemy()",200); // 100m秒毎
}

function changeEnemy() {
  enemyPattern++;
  if(enemyPattern > 9) {
    enemyPattern = 0;
  }
  document.imgEnemy.src = "../img/enemy_1_" + enemyPattern + ".png";
}

</script>

<div id="divEnemy" style="position:absolute">
<img name="imgEnemy" src="../img/enemy_1_0.png">
</div>