docs: function(event) {
      // Clear the text box on ESC.
      if (event.keyCode && event.keyCode === Event.KEY_ESC) {
        this.element.setValue('');
      }
      
      if (PDoc.Sidebar.Filterer.INTERCEPT_KEYS.include(event.keyCode))
        return;
          
      // If there's nothing in the text box, clear the results list.
      var value = $F(this.element).strip().toLowerCase();    
      if (value === '') {
        this.emptyResults();
        this.hideResults();
        return;
      }
      
      var urls  = this.findURLs(value);
      this.buildResults(urls);
    }