dectect which reCAPTCHA used when multiple on site

im working on a site where several pages are used within div, one shown at a time, one has registration, another has comments, and another file uploads,,, a menu to the left allows to choose which div is shown. on each, i want there to be a reCAPTCHA, i can find a way, although not ideal on the google developers pages to display multiple reCAPTCHAS's, but i do not know how to add something to them so i can tell which has been used. if there a way to get around this, thanks in advance -- 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.