reset_level

reset_level()
{
   MENULEV="$(( ${MENULEV} - 1 ))"
   MENUPREV="$(( ${MENULEV} -  1 ))"
   MENUNEXT="$(( ${MENULEV} + 1 ))"
   (( ${MENUPREV} <= 0 )) && MENUPREV="0"
   set_label
   return 0
}