I'm looking for something that may not exist or may be too hard to make. I want a little program that can monitor a local webpage and then alert me whenever a particular value in a table equals 0. The webpage is built-in to a local appliance. It updates every 10 secs, but it's very simple so there's no feature to report or alert on it's data. I need this tool to be able to run as a service and then do something useful like email me when the alert threshold is reached. There is also a basic username/password to access this page, so it'd be great if that was able to be configured too, but it probably doesn't matter as I'll login once and then it will be able to keep refreshing without asking for the login again.
This could run on a 2008 server or XP machine. Does anyone know of a piece of software that could do this, or know how to do it myself perhaps with Powershell?