title: NSPopUpButton-How to selectively disable some menu items?
body: <p><br>
  I have a login page in my application with two users-Administrator and Standard. On successful login, we get to the welcome page, where a pop up button is present. I want to disable the 3rd and the 4th menu items in the pop up button menu for the standard user.<br>
  For Administrator, all the menu items should be available.<br>
  I want this distinction based on the user's selection on the login page.<br>
  Please help me, how i can achieve this?<br>
  Do i have to use KVC concepts? If yes, how?</p>
  
  <p>Thanks in advance..</p>