tracking changes on a remote webpage

HiHi, I've a problem to solve and I don't know where I should start. I'll try to put it as detailed as I can... 5 times per week [Mon-Fri] at a certain time of the day [call it TIME] there are changes made on a remote webpage [http://remoteurlLetItBeThen.ee]. The page is something like this: -------------------------------------------------------------- Sometext here to give an introduction what the page is about. And after this there is a table (html, using <tr> and <td>): |----------|-------------|-------------------| | NAME | ID | AMOUNT | |----------|-------------|-------------------| | name1 | unique ID | an int number | | name2 | unique ID | another number | |----------|-------------|-------------------| some text also here to sum up the thing ----------------------------------------------------------------- What I'd like to achieve is get listed the changes for the last 5 days in the AMOUNT field AND this only for the top100 (sorted by amount). The entries on the webpage are already sorted by amount as well... I have MySQL and PHP 4.0.2 to use. Any ideas where should I start? Any good tutorials which could help me? Any (PSEUDO) code somebody could put down for me? TIA, Kristjan