// JavaScript Document

if(navigator.appVersion.charAt(0) >=3) {

var changeImg= new Array();
  changeImg[0] = new Image(); changeImg[0].src = "images/map_s.gif";
  changeImg[1] = new Image(); changeImg[1].src = "images/map_m.gif";
  changeImg[2] = new Image(); changeImg[2].src = "images/map_l.gif";
       var changeCount = 0;
var changeImgup= new Array();
  changeImgup[0] = new Image(); changeImgup[0].src = "images/btn_zoom.gif";
  changeImgup[1] = new Image(); changeImgup[1].src = "images/btn_default.gif";
  changeImgup[2] = new Image(); changeImgup[2].src = "images/btn_reduction.gif";
       var changeCount = 0;
function change1() { if(changeCount < changeImg.length-1)  {
       changeCount++;
  } else {
       changeCount = 2;  }
document.images["change_img"].src = changeImg[changeCount].src; 
document.images["kakudai_img"].src = changeImgup[changeCount].src;}
function change2() { if(changeCount > 0)  {
       changeCount--;
  } else {
       changeCount = 0;  }
document.images["change_img"].src = changeImg[changeCount].src;
document.images["kakudai_img"].src = changeImgup[changeCount].src;}
}