With these functions, you will be able to create simple event-driven
 pop-up menus. Making and using them is easy.

    The entire menuing system is based on arrays; this way, you can add or
 delete items and divider lines in each menu. When you add an item, it is
 initially selectable. Later, the attribute of selections can be logically
 set. When a divider line is added, it is automatically non-selectable
 and will remain so.