var facets = {
  activateToggle: function() {
    var toggleFilters = $$(".toggleFilter");
	  for(i = 0; i < toggleFilters.length; i++) {
		  $(toggleFilters[i]).observe("click", facets.toggle);
	  }
	},
	toggle: function() {
	  var facetBox = this.up(".filter")
	  var facetList = facetBox.select(".facetList")[0];
	  if (facetList.getStyle("display") == "none") {
	    facetBox.select(".marker")[0].update("&#8595;");
	  }
	  else {
	    facetBox.select(".marker")[0].update("&#8594;");
	  }
    facetList.toggle();
	}
}