how to Validate captcha before submit a form in joomla

Question

I have installed 5 captcha plugins in my joomla site and i set any one captcha out of 5 in com_users configuration in backend of joomla.

So how can I want to validate that captcha from client browser in registration form, client side validation for every captcha from client browser?

Answer 1

If you are using Google's reCaptcha that is the default plugin for Joomla!, the validation is done off site and a pass or fail "flag" is returned to your form...no further action needed from you.