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=400,height=800,location=no,scrollbars=no,resizable=no');
        return false;
        }