code: function( index )
  		{
  			if ( index == -1 )
  				return;
  			var links = this.element.getElementsByTag( 'a' );
  			var item = links.getItem( this._.focusIndex = index );
  
  			// Safari need focus on the iframe window first(#3389), but we need
  			// lock the blur to avoid hiding the panel.
  			if ( CKEDITOR.env.webkit || CKEDITOR.env.opera )
  				item.getDocument().getWindow().focus();
  			item.focus();
  
  			this.onMark && this.onMark( item );
  		}
docs: Mark the item specified by the index as current activated.