leamas

I am just wondering if it is possible to open a page from a website (that isn't owned by me) and do a search for specific text on that page?  Because I have a website that uses the same IDs from another site, I want to be able to go through my database, pick out the IDs, go to the page that is assoiated with that ID, and do a search for key text.  Then at the end return a report stating what needs to be changed in my database. Is this possible?  Or would I have to use Javascript and be totally lost.  :(