function get_window1 (url,h,w) {
window.open(url,'win','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=no,height='+h+',width='+w);
}

function get_window (url, h, w) {
  var maxh = screen.height - 200;
  var maxw = screen.width - 40;
  // maintain aspect ratio
  if (h > maxh) { 
    ratio = maxh / h;
    h = maxh; 
    w = ratio * w;
  } else if (w > maxw)  { 
    ratio = maxw / w;
    w = maxw; 
    h = ratio * h;
  }
  winh = h + 100;
  winw = w + 40; 
  window.open(url+'&height='+h,'_blank','toolbar=no,location=no,directories=no,status=no,menubar=no,scrollbars=no,resizable=yes,height='+winh+',width='+winw);
}