Nested mc control

I have on stage one mc which is the main menu called menu.
In this mc I have another mc which is the submenu sub_menu.
By clicking on items in the submenu I place mc’s from the library on stage
with stage.addChild(name_of_mc)

How can I remove these mc’s from stage if I click on the menu mc ?
removeChild needs to know the name of the child but this depend on de mc putted on stage in mc sub_menu

in mc sub_menu :

function fn_people_click(event:MouseEvent):void{
var mc_com2:peoples = new peoples(); //clip in lib met classname peoples
mc_com2.x= 150;
mc_com2.y= 110;
stage.addChild(mc_com2); //there are 17 different mc’s that can be on stage - the controling mc menu does not know which mc is on stage
}

in mc menu :

function remove_pages(event:MouseEvent) :void{
stage.removeChild(0); // I want to remove the mc putted on stage by sub_menu
}

So :

mc sub_menu puts a mc on stage
mc Menu has to remove this mc
mc Menu does not know which mc sub_menu had put on stage