Tracking new listings on a website

I need a program written that will periodically refresh a page of the classifieds website kufar.by, the home appliances section, and search for new listings by keywords that I will be able to set. If matches are found, it sends a message to e-mail or sends an sms message to a phone (which is even better). If a match is found by keywords and an sms message is sent, then naturally the program no longer reacts to that listing at all on the next refresh of the site.