Not sure what the issue is then, from your description.
...when a certain part of my page is in focus to display a message box.
Now that the message shows when the first input gets focused on, it's become an issue?
Seems contradictory to me, so I must be missing something. Is the issue that the message box shows up EVERYTIME a user focuses on that input?
If that's the case, you'll need to clarify under what conditions the message box should show.