After the action is completed, we need to check the return value, as usual. If the action returns 'false,' we'll have an error message pop up.
Only if the action returns 'true,' will the page load. But wait! We're not done, and your menu won't work just yet.
You may remember that we used the 'followonAction' tag in part 5 of this tutorial. The 'if' tag does exactly the same thing. You can choose which one is more intuitive for you.