$(document).ready(function() {

		    var toggle_with = function(optional_feature, label){
		      return function() {
			if($(this).attr("checked")) {
			  optional_feature.removeAttr("disabled");
			  label.attr("class", "features");
			} else {
			  optional_feature.attr("disabled",true);
			  optional_feature.removeAttr("checked");
			  label.attr("class","features disabled");
			}
		      };
		    };

		    $("#active_map").change(toggle_with($("#with_landmarking"), $("#with_landmarking_label")));
		    $("#search").change(toggle_with($("#with_tags"), $("#with_tags_label")));
});