func builtinArray_push(call FunctionCall) Value {
	thisObject := call.thisObject()
	itemList := call.ArgumentList
	index := int64(toUint32(thisObject.get("length")))
	for len(itemList) > 0 {
		thisObject.put(arrayIndexToString(index), itemList[0], true)
		itemList = itemList[1:]
		index += 1
	}
	length := toValue_int64(index)
	thisObject.put("length", length, true)
	return length
}