The page you linked to uses client side jquery to achieve this result. This is not something that you will be able to configure using any server side triggers by themselves. If you had the form submitted with some client side js you could use the values that are submitted with the form to trigger a particular server behavior, then have the page redirect back to itself after the record has been added. Since the list is drawn dynamically you should only need to insert the record and reload the page to see the change take place.