Javascript array tar bara emot 8 element?

function Item(name, owned, craftTime, stoneCost, copperCost, ironCost, silverCost, goldCost, platinumCost, diamondCost,copperBarCost,ironBarCost, gearsCost, electronicChipCost) {
   this.name = name;
   this.owned = owned;
   this.craftTime = craftTime;
   this.stoneCost = stoneCost;
   this.copperCost = copperCost;
   this.ironCost = ironCost;
   this.silverCost = silverCost;
   this.goldCost = goldCost;
   this.platinumCost = platinumCost;
   this.diamondCost = diamondCost;
   this.copperBarCost = copperBarCost;
   this.ironBarCost = ironBarCost;
   this.gearsCost = gearsCost;
   this.electronicChipCost = electronicChipCost;
   this.bonusCollected = false;
}

var copperBar = new Item("copperBar",  200, 1000, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0);
var ironBar = new Item("ironBar",  100, 5000, 0, 0, 10, 0, 0, 0, 0 ,0, 0, 0, 0);
var furnance = new Item("furnance", 0, 10000, 10000, 0 ,0 ,0 ,0 ,0 ,0 ,0 ,0, 0, 0);
var tunnelSupport = new Item("tunnelSupport", 0, 15000, 0, 10000, 10000, 0 ,0 , 0, 0 ,100, 100, 0, 0);
var diamondDepth = new Item("diamondDepth", 0, 30000, 0, 10000000, 1000000, 0, 1000000, 0, 0 ,1000, 1000, 0, 0);
var miningCart = new Item("miningCart", 0, 30000, 0, 300, 300, 0, 0, 0, 0 ,30, 30, 0, 0);
var copperPickaxe = new Item("copperPickaxe",  0, 5000, 0, 10000, 0, 0, 0, 0, 0 ,100, 0, 0, 0);
var goldPickaxe = new Item("goldPickaxe", 0, 5000, 0, 0, 0, 0, 10000, 0, 0 ,1000, 1000, 0, 0);
var gears = new Item("gears", 0 ,5000, 0, 0, 0, 0, 0, 0, 0, 200, 100, 0, 0);
var electronicChip = new Item("electronicChip" , 0, 20000, 0, 0, 0, 0, 0, 10000, 10, 0, 0, 0, 0);
var personalRobot = new Item("personalRobot", 0 ,100000, 1000000, 1000000, 0, 0, 0, 0, 0, 0, 0, 20, 1);

var allItems = [copperBar, ironBar, furnance, tunnelSupport, diamondDepth, miningCart, copperPickaxe, goldPickaxe, gears, electronicChip, personalRobot];