Total newb here.

I know a little html so i would like to make a small basic webpage that resides on my desktop and keeps track of the price of an item on a retail website.

There may be programs for this already - I'm sure there would be - but I just want a very simple script that would keep track of one item / price but only update once / day.

I thought that the XML forum might be a good place to start as I understand that it is used for dynamic website content.

I just don't understand how to use it really yet and how to point it to someone else's site and no clue how to point it to a specific part of a webpage.

Would someone be able to help me with this little project please?