expanded from coffeescript

gistfile1.js

$(document).ready(function() {
  var search_box;
  search_box = $('#search');
  return search_box.bind('keyup', function() {
    var items;
    items = $('.item_link');
    return items.each(function() {
      var item, query;
      query = $('#search').val();
      item = $(this);
      if (query.length === 0) {
        return item.show();
      } else if (item.text().indexOf(query) === -1) {
        return item.hide();
      }
    });
  });
});