if (navigator.appVersion > "3") {

    img0sh = new Image(); img0sh.src = ' sak_img/menu/sche10.gif';
    img1sh = new Image(); img1sh.src = ' sak_img/menu/sche11.gif';

    img0lh = new Image(); img0lh.src = ' sak_img/menu/link10.gif';
    img1lh = new Image(); img1lh.src = ' sak_img/menu/link11.gif';

    img0mh = new Image(); img0mh.src = ' sak_img/menu/stmap10.gif';
    img1mh = new Image(); img1mh.src = ' sak_img/menu/stmap11.gif';

}
function imgChange(imgName,imgNum) {
    if (navigator.appVersion > "3") {
        document.images[imgName].src = eval(imgNum + '.src');
    }
}