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

img = new Array();
img[0] = new Image; img[0].src = "../../images/navi01.jpg";
img[1] = new Image; img[1].src = "../../images/navi01_o.jpg";
img[2] = new Image; img[2].src = "../../images/navi02.jpg";
img[3] = new Image; img[3].src = "../../images/navi02_o.jpg";
img[4] = new Image; img[4].src = "../../images/navi03.jpg";
img[5] = new Image; img[5].src = "../../images/navi03_o.jpg";
img[6] = new Image; img[6].src = "../../images/navi04.jpg";
img[7] = new Image; img[7].src = "../../images/navi04_o.jpg";
img[8] = new Image; img[8].src = "../../images/navi05.jpg";
img[9] = new Image; img[9].src = "../../images/navi05_o.jpg";
}
function chg_img(a,b){
if(navigator.appVersion.charAt(0) >= "3"){
 document.images[a].src=img[b].src;
 }
}