if (navigator.appVersion > "3") {
    img0 = new Image(); img0.src  = 'img/a.gif';
    img1 = new Image(); img1.src  = 'img/a2.gif';
    img2 = new Image(); img2.src  = 'img/b.gif';
    img3 = new Image(); img3.src  = 'img/b2.gif';
    img4 = new Image(); img4.src  = 'img/c.gif';
    img5 = new Image(); img5.src  = 'img/c2.gif';
    img6 = new Image(); img6.src  = 'img/d.gif';
    img7 = new Image(); img7.src  = 'img/d2.gif';
    img8 = new Image(); img8.src  = 'img/top.gif';
    img9 = new Image(); img9.src  = 'img/top2.gif';

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

function disp(url){ 

window.open(url, "tanka", "width=739,height=538,scrollbars=no"); 

}