if(document.images) {
 var imgs = new Array();
 imgs[1] = new Image();imgs[1].src = "image/on/menu_01_on.jpg";
 imgs[2] = new Image();imgs[2].src = "image/on/menu_02_on.jpg";
 imgs[3] = new Image();imgs[3].src = "image/on/menu_03_on.jpg";
 imgs[4] = new Image();imgs[4].src = "image/on/menu_04_on.jpg";
 imgs[5] = new Image();imgs[5].src = "image/on/menu_05_on.jpg";
 imgs[6] = new Image();imgs[6].src = "image/menu_01.jpg";
 imgs[7] = new Image();imgs[7].src = "image/menu_02.jpg";
 imgs[8] = new Image();imgs[8].src = "image/menu_03.jpg";
 imgs[9] = new Image();imgs[9].src = "image/menu_04.jpg";
 imgs[10] = new Image();imgs[10].src = "image/menu_05.jpg";

 imgs[11] = new Image();imgs[11].src = "image/on/header_menu01_on.gif";
 imgs[12] = new Image();imgs[12].src = "image/on/header_menu02_on.gif";
 imgs[13] = new Image();imgs[13].src = "image/on/header_menu03_on.gif";
 imgs[14] = new Image();imgs[14].src = "image/on/header_menu04_on.gif";
 imgs[15] = new Image();imgs[15].src = "image/on/header_menu05_on.gif";
 imgs[16] = new Image();imgs[16].src = "image/header_menu_01.gif";
 imgs[17] = new Image();imgs[17].src = "image/header_menu_02.gif";
 imgs[18] = new Image();imgs[18].src = "image/header_menu_03.gif";
 imgs[19] = new Image();imgs[19].src = "image/header_menu_04.gif";
 imgs[20] = new Image();imgs[20].src = "image/header_menu_05.gif";

 imgs[21] = new Image();imgs[21].src = "image/top_bottom_menu/top_typo_01_01.gif";
 imgs[22] = new Image();imgs[22].src = "image/top_bottom_menu/top_typo_01_02.gif";
 imgs[23] = new Image();imgs[23].src = "image/top_bottom_menu/top_typo_01_03.gif";
 imgs[24] = new Image();imgs[24].src = "image/top_bottom_menu/top_typo_01_04.gif";
 imgs[25] = new Image();imgs[25].src = "image/top_typo_01.gif";

 imgs[31] = new Image();imgs[31].src = "image/top_bottom_menu/top_typo_02_01.gif";
 imgs[32] = new Image();imgs[32].src = "image/top_bottom_menu/top_typo_02_02.gif";
 imgs[33] = new Image();imgs[33].src = "image/top_bottom_menu/top_typo_02_03.gif";
 imgs[34] = new Image();imgs[34].src = "image/top_bottom_menu/top_typo_02_04.gif";
 imgs[35] = new Image();imgs[35].src = "image/top_typo_02.gif";

 imgs[41] = new Image();imgs[41].src = "image/top_bottom_menu/top_typo_01_05.gif";
 imgs[42] = new Image();imgs[42].src = "image/top_bottom_menu/top_typo_02_05.gif";


}
function chgimg(id, imgname) {
 if(document.images) {
  if(imgs[imgname]) {
    document.images[id].src = imgs[imgname].src;
  }
  else {
    document.images[id].src = imgname;
  }
 }
}