Generate a YGOPro Lua script for the following Yu-Gi-Oh card effect:
When the equipped monster destroys a monster by battle and sends it to the Graveyard: Inflict damage to your opponent equal to half the destroyed monster's ATK in the Graveyard.
--ジャンク・アタック
--Junk Barrage
local s,id=GetID()
function s.initial_effect(c)
	aux.AddEquipProcedure(c)
	--damage
	local e3=Effect.CreateEffect(c)
	e3:SetDescription(aux.Stringid(id,0))
	e3:SetCategory(CATEGORY_DAMAGE)
	e3:SetType(EFFECT_TYPE_FIELD+EFFECT_TYPE_TRIGGER_F)
	e3:SetCode(EVENT_BATTLE_DESTROYED)
	e3:SetProperty(EFFECT_FLAG_PLAYER_TARGET)
	e3:SetRange(LOCATION_SZONE)
	e3:SetCondition(s.damcon)
	e3:SetTarget(s.damtg)
	e3:SetOperation(s.damop)
	c:RegisterEffect(e3)
end
function s.damcon(e,tp,eg,ep,ev,re,r,rp)
	local eqc=e:GetHandler():GetEquipTarget()
	local des=eg:GetFirst()
	return des:IsLocation(LOCATION_GRAVE) and des:GetReasonCard()==eqc and des:IsMonster()
end
function s.damtg(e,tp,eg,ep,ev,re,r,rp,chk)
	if chk==0 then return true end
	eg:GetFirst():CreateEffectRelation(e)
	Duel.SetTargetPlayer(1-tp)
	Duel.SetOperationInfo(0,CATEGORY_DAMAGE,nil,0,1-tp,0)
end
function s.damop(e,tp,eg,ep,ev,re,r,rp)
	local des=eg:GetFirst()
	local p=Duel.GetChainInfo(0,CHAININFO_TARGET_PLAYER)
	if des:IsRelateToEffect(e) then
		local dam=des:GetAttack()/2
		if dam<0 then dam=0 end
		Duel.Damage(p,dam,REASON_EFFECT)
	end
end