def captcha_field(object_name, options = {})
      options.delete(:id)

      hidden_field(object_name, :captcha_challenge, options) + text_field(object_name, :captcha_solution, options)
    end
def captcha_field(object_name, options = {})
      options.delete(:id)

      hidden_field(object_name, :captcha_challenge, options) + text_field(object_name, :captcha_solution, options)
    end
Returns an input tag of the "text" type tailored for entering the captcha solution.

 Internally calls Rails' #text_field helper method, passing the +object_name+ and
 +options+ arguments.