I'm signing up for classes at my university and I am waiting for a certain discussion section to have an open seat and I don't want to get on the waiting list because then it causes other issues (I'll skip the long description of all the intricacies of our university's system and why I wouldn't want to get on the waiting list). Anyway, so I keep going back to the schedule page and checking again and again its status. Is there a way to automate this so that every hour or whatnot my computer would check if there was a specific change in the page and if there were then it would alert me? (I can describe the change in terms of the character string that describes a number in between two unchanging character strings in the HTML code). Thank you.