code: def _send(self, javascript):
          
  
          # Prepend JS to switch to the proper client context.
          message = """
              var _ctx = ctx_switch('%s'),
                  browser = _ctx[0],
                  ELEMENTS = _ctx[1];
              %s
          """ % (id(self), javascript)
  
          response = self.connection.send(message)
  
          return self._handle_response(response)
docs: Establishes a socket connection to the zombie.js server and sends
          Javascript instructions.
  
          :param js: the Javascript string to execute