function popup(url,w,h) {
    wname='as_print';

    if(typeof w == 'undefined'){
      w = 600;
    }
    if(typeof h == 'undefined'){
      h = 400;
    }

    popupwin = window.open(url, wname, 'toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=yes,resizable=yes,copyhistory=no,width='+w+',height='+h);
    popupwin.window.focus();
}