data scrape

simple extraction of product id numbers from a database, simply login to the web based GUI provided? and input a sequence of dates for a number of years and when the output search results are displayed extract the product ids and store them into a txt file. this would be done for 6 different types of products but all are? similar in for output except a slight change in requesting the data through the GUI. I already have a demo of what I am looking for but not fully functional