function newWindow(l) {

  MeinFenster = window.open(l,'_blank','width=850,height=570,resizeable=yes,scrollbars= yes');
  MeinFenster.focus();

}

function newWindowBig(l) {

  MeinFenster = window.open(l,'_blank','width=700,height=740,resizeable=yes,scrollbars= yes');
  MeinFenster.focus();

}