function open_window(url,wname,w,h,t,l,sb,tb,mb){
  var wnd;
  if (typeof(wname)=="undefined") {  wname="_blank" }
  if (isNaN(w)) {  w="400" }
  if (isNaN(h)) {  h="300" }
  if (isNaN(t)) {  t="50" }
  if (isNaN(l)) {  l="50" }

  if (typeof(sb)=="undefined") { sb="yes" }
  if (typeof(tb)=="undefined") { tb="no" }
  if (typeof(mb)=="undefined") { mb="no" }

  params = 'target='+wname+', toolbar='+tb+', menubar='+mb+', scrollbars=' + sb + ', width='+w+', height='+h+', top='+t+', left='+l
  wnd=window.open(url,wname,params, true); 
  wnd.focus(); 
}