Post #358: 
draguu:
i want to open menu01 is lamp is selected , menu02 if object is selected , and menu03 if nothing is selected
Did you try this example?
To open menu03 (when nothing is selected) you need to modify the code for ‘Object Context Sensitive Menu’:
name = C.selected_objects and C.active_object.type.title() or "Nothing"; open_menu(name) or open_menu("Object")
You need to rename menu01 to Lamp, menu02 to Object and menu03 to Nothing