app/assets/javascripts/filters_form.js
$(function(){
$("#filters").hide();
$("#btn-filters-toggle").click(function(){
$("#btn-filters-toggle>span").toggleClass("th_sort_desc");
$("#btn-filters-toggle>span").toggleClass("th_sort_asc");
// $("#filters").animate({width: 'toggle'});
$("#filters").toggle("fast");
})
})