//ユーザが設定する変数----------------------------------
  //元来の画像配列
  orign_array = new Array();
  orign_array[0] = new Image(); orign_array[0].src = "img/top.gif";
  orign_array[1] = new Image(); orign_array[1].src = "img/kousoburo.gif";
  orign_array[2] = new Image(); orign_array[2].src = "img/aisatu.gif";
  orign_array[3] = new Image(); orign_array[3].src = "img/koe.gif";
  orign_array[4] = new Image(); orign_array[4].src = "img/annai.gif";

  //変更後の画像配列
  image_array = new Array();
  image_array[0] = new Image(); image_array[0].src = "img/top01.gif";
  image_array[1] = new Image(); image_array[1].src = "img/kousoburo01.gif";
  image_array[2] = new Image(); image_array[2].src = "img/aisatu01.gif";
  image_array[3] = new Image(); image_array[3].src = "img/koe01.gif";
  image_array[4] = new Image(); image_array[4].src = "img/annai01.gif";

//------------------------------------------------------

flag = new Array();
for (i=0; i<image_array.length; i++) { flag[i] = 0; }

function image_change (id, num){
  if (image_array.length == orign_array.length) {
    if (flag[num] == 0) {
      document.getElementById(id).setAttribute("src", image_array[num].src);
      flag[num] = 1;
    }else if (flag[num] == 1) {
      document.getElementById(id).setAttribute("src", orign_array[num].src);
      flag[num] = 0;
    }else if (flag[num] == 2) {
      document.getElementById(id).setAttribute("src", orign_array[num].src);
      flag[num] = 0;
    }else if (flag[num] == 3) {
      document.getElementById(id).setAttribute("src", orign_array[num].src);
      flag[num] = 0;
    }else if (flag[num] == 4) {
      document.getElementById(id).setAttribute("src", orign_array[num].src);
      flag[num] = 0;
    }
  }
}