$(document).ready(function() {
	$('.category_id').bind('click', function(){
		if($(this).val() != '') {
			$('#distinctTypes, #distinctFeatures').hide('slow');
			$('div[id^="type_"], div[id^="feature_"]').each(function(index, elem) {
				$(elem).hide('fast');
			});
			$('div[id$="_'+$(this).val()+'"]').each(function(index, elem) {
				$(elem).show('slow');
			});
		} else {
			$('div[id^="type_"], div[id^="feature_"]').each(function(index, elem) {
				$(elem).hide('fast');
			});
			$('#distinctTypes, #distinctFeatures').show('slow');
		}
	});
});