title: Send a refresh request to another page opened in the browser
body: <p>I have page A that creates a window with the page B.</p>
  
  <p>Page B asks the user some datas, inserts them in the database and then closes itself.
  After the insertion, I'm trying to make page A refresh automatically (it can be both from A seeing that B has closed, or by a function triggered by B itself before (or after?) closing)</p>
  
  <p>How can I do that?</p>