Excel macro programming (something like Visual Basic).
I made a similar excel script once to get the bandwidth usage from the ISP's website and add em up in excel spreadsheet. My internet was (a long time ago) capped on bandwidth/month.
Shell(prgm) is your friend. It's actually quite simple to launch internet-explorer or some other browser from macro then read it's contnents using innerText or innterHTML
Look up some things on VB Macro scripting