[thelist] JS Popup won't close with window.close()

[CDitty]

I am trying to close a popup window with some JS (see below) but it is not 
working.  I don't seem to be getting an errors.  Anyone see anything wrong 
with either example?

         <script language="javascript">
         <!-- HIDE FROM OLD BROWSERS
                 alert("You have played your alloted plays today.\nPlease 
play again tomorrow.");
                 window.close();
         // END HIDING -->
         </script>

         <script language="javascript">
         <!-- HIDE FROM OLD BROWSERS
                 alert("You have played your alloted plays today.\nPlease 
play again tomorrow.");
                 self.close();
         // END HIDING -->
         </script>

Thanks

CDitty