Description:
+The onShow property of the menu object is an event
+handler for the event of when the options menu is open. In other words, when
+the end user presses the left softkey, the system will fire an event and a
+widget can catch the event by providing a callback function.
For more general information on using an options menu in your widget, +see Using softkeys.
+Syntax:
+[void] window.menu.onShow = function() { }
+or
+[void] menu.onShow = menupaneShown;
+function menupaneShown()
+{
+ // ...
+}
+