function nv_opnwin(w,h,f,caption,text){
  f = 'nv_opnwin.php?v='+f+'&caption='+caption+'&width='+w+'&height='+h+'&text='+text;
  winp = window.open(f,'nv_opnwin','toobar=no,location=no,directories=no,status=no,scrollbars=no,resizable=no,copyhistory=no,width='+ w + ', height='+ h);
  winp.focus();
 }