if(navigator.appVersion.charAt(0) >= "3")
{
  img = new Array();
  img[1] = new Image; img[1].src = "../head/head1_06.gif";
  img[2] = new Image; img[2].src = "../head/head4_06.gif";
  img[3] = new Image; img[3].src = "../head/head1_09.gif";
  img[4] = new Image; img[4].src = "../head/head4_09.gif";
  img[5] = new Image; img[5].src = "../head/head1_12.gif";
  img[6] = new Image; img[6].src = "../head/head4_12.gif";
  img[7] = new Image; img[7].src = "../menu/menu1_01.gif";
  img[8] = new Image; img[8].src = "../menu/menu4_01.gif";
  img[9] = new Image; img[9].src = "../menu/menu1_02.gif";
  img[10] = new Image; img[10].src = "../menu/menu4_02.gif";
  img[11] = new Image; img[11].src = "../menu/menu1_03.gif";
  img[12] = new Image; img[12].src = "../menu/menu4_03.gif";
  img[13] = new Image; img[13].src = "../menu/menu1_04.gif";
  img[14] = new Image; img[14].src = "../menu/menu4_04.gif";
  img[15] = new Image; img[15].src = "../menu/menu1_05.gif";
  img[16] = new Image; img[16].src = "../menu/menu4_05.gif";
  img[17] = new Image; img[17].src = "../menu/menu1_06.gif";
  img[18] = new Image; img[18].src = "../menu/menu4_06.gif";
  img[19] = new Image; img[19].src = "../menu/menu1_07.gif";
  img[20] = new Image; img[20].src = "../menu/menu4_07.gif";
}
function chg_img(a,b){
  if(navigator.appVersion.charAt(0) >= "3"){
    document.images[a].src=img[b].src;
  }
}