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=920,height=440,scrollbars=yes,toolbar=yes,resizable=yes').focus();
    return false;
}