img1 = new Image;
img1.src = "images/site/img5.gif";
img2 = new Image;
img2.src = "images/site/img6.gif";

function openwin(w, h, url) {
    w+=40;
    h+=30;
    window.open(url,'','width='+w+',height='+h+',status=no,toolbar=no,resizable=no,scrollbars=yes');
}