filter for lifestream

filter.js

$("#filter").live("keyup", function (ev) {
  var $filter = $(this),
      keyCode = ev.keyCode || ev.which,
      search;
 
  if (keyCode === 27) { //ESC
    $filter.val("");
  }
 
  search = $(this).val();
  $("#lifestream").find("li").each(function () {
    var $li = $(this);
    if (search === "") {
      $li.show();
    } else {
      if (_.include(service_names, search)) {
        $li.toggle($li.hasClass("lifestream-" + search));
      } else {
        if ($li.text().search(search) > 0) {
          $li.show();
        } else {
          $li.hide();
        }
      }
    }
  });
});

Hi,

I was trying to implement this filter but seems nothing is happeninng, can you assist on how to use this? I have a dropdown menu to filter my social medias

Thanks!