var validate_subscribe = function(response) {
  var response_json = eval('(' + response + ')');
  $('email').removeClassName('bg-red');
  if (response_json.error) {
    $('email').addClassName('bg-red');
  } else {
    Element.hide('window-email');
    $('email').value = '';
  }
}

var toggle_window = function(w) {
  if ($(w).style.display == '') {
    Effect.Fade(w);
    $('email').value = '';
    $('email').removeClassName('bg-red');
  } else {
    Effect.Appear(w);
  }
}

var toggle_commingsoon = function(w) {
  if ($(w).style.display == '') {
    Effect.Fade(w);
  } else {
    Effect.Appear(w);
  }
}

var change_state = function (state) {
    if (state == 1) {
      Element.show('exelsum20');
      $('background-container').addClassName('uncollapse');
    } else {
      Element.hide('exelsum20');
      $('background-container').removeClassName('uncollapse');
    }
  }