It depends on how it updates the page. If it uses a Refresh header or the equivalent, you can just keep reloading the URL in this header at the requested intervals. If it uses JavaScript, it's much harder; it's probably easiest to see what the JavaScript does, hack up something similar in Perl, and hope they don't change the code too much. There have been some threads in the past about actually interpreting JavaScript code from Perl, which you can find with SuperSearch.