Selecteditem Trouble

local termWidth, termHeight = term.getSize()
selectedItem = 1
--[[menu methods]]--
function addSlave()
end
function checkSlave()

end
function removeSlave()

end
function addTurtle()
end
function checkTurtle()
end
function removeTurtle()
end
function slaveBack()
inSlaveMenu = false
selectedItem = 1
end
function turtleBack()
inTurtleMenu = false
selectedItem = 1
end
function Exit()
inMainMenu = false
inSlaveMenu = false
inTurtleMenu = false
term.clear()
term.setCursorPos(1, 1)
end
--[[menu definitions]]--
mainMenu = {
[1] = {text = 'Slave Operation', handler = slaveOperation},
[2] = {text = 'Turtle Operation', handler = turtleOperation},
[3] = {text = 'Exit', handler = Exit}
}
slaveMenu = {
[1] = {text = 'add slave', handler = addSlave},
[2] = {text = 'check slave', handler = checkSlave},
[3] = {text = 'remove slave', handler = removeSlave},
[4] = {text = 'back', handler = slaveBack}
}
turtleMenu = {
[1] = {text = 'add turtle', handler = addTurtle},
[2] = {text = 'check turtle', handler = checkTurtle},
[3] = {text = 'remove turtle', handler = removeTurtle},
[4] = {text = 'back', handler = turtleBack}
}
--[[printing methods]]--
function printMenu( menu )
print("--------------------------------------------------")
print("------[[Generator Master Control Interface]]------")
print("--------------------------------------------------\n")
for i=1,#menu do
   if i == selectedItem then
   print(">> "..menu[i].text)
  else
   print("   "..menu[i].text)
  end
end
end
--[[handler method]]--
function onKeyPressed( key, menu)
if key == keys.enter then
  onItemSelected(menu)
elseif key == keys.up then
  if selectedItem > 1 then
   selectedItem = selectedItem - 1
  end
elseif key == keys.down then
  if selectedItem < #menu then
   selectedItem = selectedItem + 1
  end
end
end
function onItemSelected( menu )
menu[selectedItem].handler()
end
--[[main method]]--
function main()
inMainMenu = true
while inMainMenu do
  term.clear()
  term.setCursorPos(1, 1)
  printMenu( mainMenu )

  event, key = os.pullEvent("key")
  onKeyPressed(key,mainMenu)
end
end
function slaveOperation()
inSlaveMenu = true

while inSlaveMenu do
  term.clear()
  term.setCursorPos(1,1)
  printMenu( slaveMenu )

  event, key = os.pullEvent("key")
  onKeyPressed(key,slaveMenu)
end
end
function turtleOperation()
inTurtleMenu = true

while inTurtleMenu do
  term.clear()
  term.setCursorPos(1,1)
  printMenu( turtleMenu )

  event, key = os.pullEvent("key")
  onKeyPressed(key,turtleMenu)
end
end
main()