if(navigator.appVersion.charAt(0) >= "3"){
  img = new Array();
  img[0] = new Image; img[0].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-home.gif";
  img[1] = new Image; img[1].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-home_hover.gif";
  img[2] = new Image; img[2].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-kanko.gif";
  img[3] = new Image; img[3].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-kanko_hover.gif";
  img[4] = new Image; img[4].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-marine.gif";
  img[5] = new Image; img[5].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-marine_hover.gif";
  img[6] = new Image; img[6].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-gourmet.gif";
  img[7] = new Image; img[7].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-gourmet_hover.gif";
  img[8] = new Image; img[8].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-charter.gif";
  img[9] = new Image; img[9].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-charter_hover.gif";
  img[10] = new Image; img[10].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-photo.gif";
  img[11] = new Image; img[11].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-photo_hover.gif";
  img[12] = new Image; img[12].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-blog.gif";
  img[13] = new Image; img[13].src = "http://www.cerulean-blue.co.jp/image/navigation/navi-blog_hover.gif";
 
}
function chg_img(a,b){  
  if(navigator.appVersion.charAt(0) >= "3"){
    document.images[a].src=img[b].src;
  }
}
//