I must setup a script or something like that which will download the html file of the given url every fifteen minutes approximately and appearance whether it has transformed because the last check. Whether it has transformed it will send a contact to my gmail. My idea ended up being to simply to just obtain the md5 hash and compare it towards the 4g iphone, and employ cron for that arranging (haven't used cron before though). But apart from that, I've no clue the way i can set this up. I've got a domain on hostgator which should have all the feaures I want, but I'm not sure how to start. How do you even test &lifier operate a script around the server?

I am sure they are noobish questions :P but any help would use your charm)