def responds_to_parent(&block)
      yield

      if performed?
        # Either pull out a redirect or the request body
        script =  if response.headers['Location']
                    #TODO: erase_redirect_results is missing in rails 3.0
                    "document.location.href = '#{self.class.helpers.escape_javascript location.to_s}'"
                  else
                    response.body || ''
                  end

        # Eval in parent scope and replace document location of this frame
        # so back button doesn't replay action on targeted forms
        # loc = document.location to be set after parent is updated for IE
        # with(window.parent) - pull in variables from parent window
        # setTimeout - scope the execution in the windows parent for safari
        # window.eval - legal eval for Opera
        script = "<html><body><script type='text/javascript' charset='utf-8'>
          var loc = document.location;
          with(window.parent) { setTimeout(function() { window.eval('#{self.class.helpers.escape_javascript script}'); window.loc && loc.replace('about:blank'); }, 1) }
        </script></body></html>"

        # We're returning HTML instead of JS or XML now
        response.headers['Content-Type'] = 'text/html; charset=UTF-8'

        # Clear out the previous render to prevent double render and then render
        if respond_to?(:erase_results, true)
          erase_results
        else
          instance_variable_set(:@_response_body, nil)
        end

        render :text => script
      end
    end
def responds_to_parent(&block)
      yield

      if performed?
        # Either pull out a redirect or the request body
        script =  if response.headers['Location']
                    #TODO: erase_redirect_results is missing in rails 3.0
                    "document.location.href = '#{self.class.helpers.escape_javascript location.to_s}'"
                  else
                    response.body || ''
                  end

        # Eval in parent scope and replace document location of this frame
        # so back button doesn't replay action on targeted forms
        # loc = document.location to be set after parent is updated for IE
        # with(window.parent) - pull in variables from parent window
        # setTimeout - scope the execution in the windows parent for safari
        # window.eval - legal eval for Opera
        script = "<html><body><script type='text/javascript' charset='utf-8'>
          var loc = document.location;
          with(window.parent) { setTimeout(function() { window.eval('#{self.class.helpers.escape_javascript script}'); window.loc && loc.replace('about:blank'); }, 1) }
        </script></body></html>"

        # We're returning HTML instead of JS or XML now
        response.headers['Content-Type'] = 'text/html; charset=UTF-8'

        # Clear out the previous render to prevent double render and then render
        if respond_to?(:erase_results, true)
          erase_results
        else
          instance_variable_set(:@_response_body, nil)
        end

        render :text => script
      end
    end
Executes the response body as JavaScript in the context of the parent window.
 Use this method of you are posting a form to a hidden IFRAME or if you would like
 to use IFRAME base RPC.