if(navigator.appVersion.charAt(0) >= 3) {
 var img = new Array();
 img[0]  = new Image();  img[0].src  = "img/bt_menu01.gif";
 img[1]  = new Image();  img[1].src  = "img/bt_menu02.gif";
 img[2]  = new Image();  img[2].src  = "img/bt_goods01.gif";
 img[3]  = new Image();  img[3].src  = "img/bt_goods02.gif";
 img[4]  = new Image();  img[4].src  = "img/bt_qa01.gif";
 img[5]  = new Image();  img[5].src  = "img/bt_qa02.gif";
 img[6]  = new Image();  img[6].src  = "img/bt_diary01.gif";
 img[7]  = new Image();  img[7].src  = "img/bt_diary02.gif";
 img[8]  = new Image();  img[8].src  = "img/bt_shop01.gif";
 img[9]  = new Image();  img[9].src  = "img/bt_shop02.gif";
// img[10] = new Image();  img[10].src = "img/ug_m01.gif";
// img[11] = new Image();  img[11].src = "img/ug_m02.gif";
 img[12] = new Image();  img[12].src = "img/b_map01.gif";
 img[13] = new Image();  img[13].src = "img/b_map02.gif";
 img[14] = new Image();  img[14].src = "img/bt_tokusyu01.gif";
 img[15] = new Image();  img[15].src = "img/bt_tokusyu02.gif";
         }

function chimg(nam,num) {
  if(navigator.appVersion.charAt(0) >= 3) {
    document.images[nam].src = img[num].src;
  }
}