if(navigator.appVersion.charAt(0) >= "3")
{
  img = new Array();
  img[1] = new Image; img[1].src = "../menu/menu_00.gif";
  img[2] = new Image; img[2].src = "../menu/menu_01.gif";
  img[3] = new Image; img[3].src = "../menu/menu_02.gif";
  img[4] = new Image; img[4].src = "../menu/menu_03.gif";
  img[5] = new Image; img[5].src = "../menu/menu_04.gif";
  img[6] = new Image; img[6].src = "../menu/menu_05.gif";
  img[7] = new Image; img[7].src = "../menu/menu_06.gif";
  img[8] = new Image; img[8].src = "../menu/menu_07.gif";
  img[9] = new Image; img[9].src = "../menu/menu_08.gif";
  img[10] = new Image; img[10].src = "../menu/menu_09.gif";
  img[11] = new Image; img[11].src = "../menu/menu_10.gif";
  img[12] = new Image; img[12].src = "../menu/menu_11.gif";
}
function chg_img(a,b){
  if(navigator.appVersion.charAt(0) >= "3"){
    document.images[a].src=img[b].src;
  }
}