Look for a base:

function show_menu (id_objet)
{
.........
if (id_objet ==1){pan1.visible =1;}
if (id_objet ==2){pan2.visible =1;}
if (id_objet ==3){pan3.visible =1;}
.......
}

function objet_event()
{
if (event_type == EVENT_CLICK)
{
if (my.skill1 ==1){show_menu(1);}
if (my.skill1 ==2){show_menu(2);}
.......
}
}

function menu_on_click()
{
my.ENABLE_CLICK = ON; // A6
my.emask |= ENABLE_CLICK; // A7
my.event = mouse_event;
}

action objet ()
{
menu_on_click();
....
....
}