How to create 3 level tree menu

programming flash
1

Is’t possible to create a 3 level tree menu? just like below:

Menu1
–menu1.1
----menu1.1.1
----menu1.1.2
–menu1.2
–menu1.3
menu2
menu3
menu4

All the flash menu i found are only have second level. Really need someone help me of this. Thanks