function rules() {
  
   window.open('http://www.ilpioppeto.it/de/index.php?page=rules', 'popup', 'width=550, height=400, top=100, left=100, menubar=0, scrollbars=1, location=0, toolbar=0,  resizable=1, status=0');
    
  }

  function payment() {
  
   window.open('http://www.ilpioppeto.it/de/index.php?page=payment', 'popup', 'width=550, height=400, top=100, left=100, menubar=0, scrollbars=1, location=0, toolbar=0,  resizable=1, status=0');
    
  }

  function board() {
  
   window.open('http://www.ilpioppeto.it/de/index.php?page=halbpension_oder_vollpension', 'popup', 'width=550, height=400, top=100, left=100, menubar=0, scrollbars=1, location=0, toolbar=0,  resizable=1, status=0');
    
  }


  function residence() {
  
   window.open('http://www.ilpioppeto.it/de/index.php?page=residence2', 'popup', 'width=550, height=400, top=100, left=100, menubar=0, scrollbars=1, location=0, toolbar=0,  resizable=1, status=0');
    
  }