document.observe("dom:loaded", function() {
  $('inside-passage-header').observe('click', function(event) {
  		filter('inside-passage');
  });
  $('gulf-of-alaska-header').observe('click', function(event) {
  		filter('gulf-of-alaska');
  });
  $('cruise-tours-header').observe('click', function(event) {
  		filter('cruise-tours');
  });
  filter('inside-passage');
});

function filter(type) {
	$('inside-passage-header').removeClassName('selected');
	$('gulf-of-alaska-header').removeClassName('selected');
	$('cruise-tours-header').removeClassName('selected');
	$(type + '-header').addClassName('selected');
	$('inside-passage-content').hide();
	$('gulf-of-alaska-content').hide();
	$('cruise-tours-content').hide();
	$(type + '-content').show();
	getOffers('/offers/cruise/extra/' + type + '/date-asc');
}