function toggle_amenity_block(toggle) {
  if (toggle == 'off') {
    var boxes = document.getElementById('amenityblock').getElementsByTagName('input');
    for (i = 0; i < boxes.length; i++) {
      if ( boxes[i].getAttribute("type") == 'checkbox' ) {
        if (boxes[i].checked)
          boxes[i].checked = false;
      }
    }
    document.getElementById('amenityblock').style.display = "none";
    document.getElementById('amenitylink').style.display = "block";
  } else {
    document.getElementById('amenityblock').style.display = "block";
    document.getElementById('amenitylink').style.display = "none";
  }

}