function visLokale(url, bredde, hoyde)
 { 
  var b = bredde; var x = (screen.width - b) / 2;
  var h = hoyde; var y = (screen.height - h) / 4;
  var topp = 'menubar=no,toolbar=no,location=no,directories=no,';
  var system = 'scrollbars=yes,resizable=no,status=no,copyhistory=yes,';
  var plass = 'width=' + b + ',height=' + h + ',left=' + x + ', top=' + y;
  window.open( url, '_blank', topp + system + plass) 
}