code: function() {
  			_engine.execute('BEGIN');
  			_engine.execute('DELETE FROM ' + _TABLE_NAME + ' WHERE location="' + eURI(this._location) + '"');
  			_engine.execute('COMMIT');
  			this._keys = [];
  			this.length = 0;
  		}
docs: /*
  Implementation to clear the values from the storage engine.
  @see YAHOO.util.Storage._clear