function launchWindow(url, name, w, h)  {
  var winX = (screen.availWidth - w)*.5;
  var winY = (screen.availHeight - h)*.5;
  var scroll = 'no';
  actieplanwindow = window.open(url, name,'width=' + w + ',height=' + h + ',left=' + winX + ',top=' + winY + ',scrollbars=' + scroll);
  }