Refresh page open in another tab

I have an internal web application used by one department in our company. The app has a page with a gridview showing all inspection records for a part. When the user clicks on a record it will open that record in another tab. After they are done editing that record and click the close button I would like the original page with the gridview to refresh. Is this possible? Any examples? I've googled and checked other forums and can't seem to find any reliable method to do this.

So I found this post on ASP Snippets that gave a refresh parent script that would do this. Unfortunately, it refreshes the parent on any action and not just unload (i.e. click in a text box, move to the next control, save, close). Also, there is the annoying browser popup saying asking if the user was to try resending the data. Any input on how to get this to work correctly?