title: web2py button with action and visual pudates
body: <p>I have a view with a button and a DIV</p>
  
  <p>I am trying to have this kind of functionality:</p>
  
  <ol>
  <li><p>if the button is clicked - a controller method is executed ( i have the method, db.insert, etc.) 
                            - if test (inside the controller method) is passed the button dissapears and the div appears ( I thought at using ajax - not to refresh the hole page)</p></li>
  <li><p>whenever the page is refreshed the test has to be made again for the button to be visible or not</p></li>
  </ol>
  
  <p>thanks</p>