Any method that we can detect the request is been submitting?

Hi All, I am not sure if someone could provide me an answer/hint on this. I want to detect the event that, when user clicks the checkbox and waits for the response. So, in short, the event, between the request been sent. This is to prevent the user from submitting the form, telling them, "please wait till the request is completed". So is there a way to detect this "circling" events? Thanks, Ho. -- You received this message because you are subscribed to the Google Groups "reCAPTCHA" group. To unsubscribe from this group and stop receiving emails from it, send an email to recaptcha+unsubscribe@googlegroups.com. To post to this group, send email to recaptcha@googlegroups.com. Visit this group at http://bit.ly/1dkFnYd. For more options, visit http://bit.ly/P65DvS.