function popup(mylink, windowname) {
    if (! window.focus) {
        return true;
    }
    var href;
    if (typeof(mylink) == 'string') {
        href=mylink;
    } else {
        href=mylink.href;
        window.open(href, windowname, 'width = 500, height = 455, scrollbars = no');
        return false;
    }
}