Analytics App Browser Automation JS Scraping Excel

I need a starter analytics application. The requirements are the following: 1) Be able to script a browser and parse rendered javascript in real time 2) Capture key pair values from rendered JS and place into any DB 3) Build a quick web site that can query and report against information collected over time 4) The web site should be able to handle ad-hoc queries against stored data Language and DB are essentially any choice, but it does need to have some sustainability to it. This would be an intro project, there would be additional work built upon this.