How do I control another tab using a tab I am currently on?

I have a ui that is built on php's built in server (running on localhost). How can I make a button, that when pressed, will open a page in a new tab and clear cookies and refresh that page every few minutes until it changes.

In short, I'd like to make a script that clears cookies and refreshes until a change on a page is detected, and I want to control it with a button on my php page that is running on localhost.