auto sending message program at auction

hello, I want a program which send message to exhibisitor in auction automatically with using cron job. I dont mind design because its not for our client. interface is okay with english. 1) search for keyword like "iPhone 16gb 5 -5s -5c" at [login to view URL] 2) you will get search result like [login to view URL] 3) go to product page like below from search result page for example. ** I think you cannot find product page below from search result page because you will see later than the time when I m making this explanation. [login to view URL] 4) at [login to view URL], "h192137060" in this URL is auction ID. and "macfun_good_device" in this page is exhibitor ID. *** see [login to view URL] to go to next page 5) Click ??????? and go to [login to view URL] (**to go to this page, see attached image) *** see [login to view URL] to login 6) send message at this page *** see [login to view URL] ¦¦¦ 1) its better if we can set keyword freely 2) its better if we can set message freely like below. * in case of keyword "A", send message of "aaaaaa", in case of keyword "B", send message of "bbbbbb" etc