[Error][SOLVED] attempt to compare string with number expected, got string

version = "Storage Turtle 0.1"
running = true
select = 1
xcoord = {}
ycoord = {}
side = {}
itemname = {}
itemid = {}
id = 1
item1 = ""
a = 6
local w,h = term.getSize()
z = h-3
local function load(file)
local f = fs.open(file,"r")
local data = f.readAll()
f.close()
return textutils.unserialize(data)
end

local function getItemName()
if itemname[id] == "" then
   return ("No Item" .. id)
else
   return itemname[id]
end
end

local function printCentered(str, ypos)
term.setCursorPos(w/2 - #str/2, ypos)
term.write(str)
end
local function printRight(str, ypos)
term.setCursorPos(w-#str, ypos)
term.write(str)
end
function drawHeader(title, line)
printCentered(title, line)
printCentered(string.rep("-", w), line+1)
end
function drawCopyright()
printRight("by UNOBTANIUM", h)
end


function drawMenuMain()
drawCopyright()
drawHeader(version,1)
if select == 1 then
   printCentered("> Get Item <", a)
else
   printCentered("Get Item", a)
end
if select == 2 then
  printCentered("> Sort Items <", a+1)
else
  printCentered("Sort Items", a+1)
end
if select == 3 then
  printCentered("> Quit <", z)
else
  printCentered("Quit", z)
end
end

function drawMenuGetItem()
drawCopyright()
drawHeader(version,1)
drawHeader("GET ITEM",3)
item1 = getItemName()
if select == 1 then
   printCentered("> ".. item1 .." <", a)
else
   printCentered(item1, a)
end
if select == 2 then
   printCentered("> Back <", z)
else
   printCentered("Back", z)
end
end

local menustate = "main"
local mopt = {
["main"] = {
   options = {"sget", "ssort", "quit"},
   draw = drawMenuMain
},
["sget"] = {
   options = {"item", "main"},
   draw = drawMenuGetItem
}
}

function runMenu()
while true do
   term.clear()
   mopt[menustate].draw()
   local id, key = os.pullEvent("key")
   if key == 200 then
	select = select-1
   end
   if key == 208 then
	select = select+1
   end
   if select == 0 then
	select = #mopt[menustate].options
   end
   if select > #mopt[menustate].options then
	select = 1
   end
   if menustate == "sget" and key == 205 then -- HERE is the right key
	id = id + 1
   end
   if menustate == "sget" and key == 203 then -- AND HERE is the left key
	if id > 1 then
	 id = id - 1
	end
  end
  
  term.clear()
  term.setCursorPos(1,1)
  term.clear()
  if key == 28 then
   if mopt[menustate].options[select] == "quit" then
	rednet.broadcast("sshutdown")
	running = false
	break
   end
   if mopt[menustate].options[select] == "item" then
	rednet.broadcast(id)
	break
   end
   if mopt[menustate].options[select] == "ssort" then
	rednet.broadcast("ssort")
	break
   end
   menustate = mopt[menustate].options[select]
   select = 1
  end
end
end



xcoord = load("xcoord.txt")
ycoord = load("ycoord.txt")
side = load("side.txt")
itemname = load("itemname.txt")
itemid = load("itemid.txt")
rednet.open("back")
rednet.open("top")
while running do
runMenu()
end

xcoord = {0,0,1,1,2,2,3,3,4,4}
ycoord = {0,0,1,1,2,2,3,3,4,4}
side = {true,false,true,false,true,false,true,false,true,false}
itemname = {"a","b","c","d","e","f","g","h","i","j"}
itemid = {1,2,3,4,5,6,7,8,9,10}