Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
(This card is always treated as an "Archfiend" card.) The equipped monster gains 1000 ATK. When this card is sent from the field to the Graveyard: You can Tribute 1 monster; place this card on the top of your Deck.
--デーモンの斧
--Axe of Despair
local s,id=GetID()
function s.initial_effect(c)
	aux.AddEquipProcedure(c)
	--Atk up
	local e1=Effect.CreateEffect(c)
	e1:SetType(EFFECT_TYPE_EQUIP)
	e1:SetCode(EFFECT_UPDATE_ATTACK)
	e1:SetValue(1000)
	c:RegisterEffect(e1)
	--to deck
	local e2=Effect.CreateEffect(c)
	e2:SetDescription(aux.Stringid(id,0))
	e2:SetCategory(CATEGORY_TODECK)
	e2:SetProperty(EFFECT_FLAG_DAMAGE_STEP)
	e2:SetType(EFFECT_TYPE_SINGLE+EFFECT_TYPE_TRIGGER_O)
	e2:SetCode(EVENT_TO_GRAVE)
	e2:SetCondition(s.tdcon)
	e2:SetCost(s.tdcost)
	e2:SetTarget(s.tdtg)
	e2:SetOperation(s.tdop)
	c:RegisterEffect(e2)
end
function s.tdcon(e,tp,eg,ep,ev,re,r,rp)
	return e:GetHandler():IsPreviousLocation(LOCATION_ONFIELD)
end
function s.tdcost(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return Duel.CheckReleaseGroupCost(tp,nil,1,false,nil,nil) end
	local g=Duel.SelectReleaseGroupCost(tp,nil,1,1,false,nil,nil)
	Duel.Release(g,REASON_COST)
end
function s.tdtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return e:GetHandler():IsAbleToDeck() end
	Duel.SetOperationInfo(0,CATEGORY_TODECK,e:GetHandler(),1,0,0)
end
function s.tdop(e,tp,eg,ep,ev,re,r,rp)
	if e:GetHandler():IsRelateToEffect(e) then
		Duel.SendtoDeck(e:GetHandler(),nil,SEQ_DECKTOP,REASON_EFFECT)
	end
end