[Maul]

You could use the [petbattle] macro conditional that others of us requested for just this sort of thing -

local frame = CreateFrame("Frame", nil, UIParent, "SecureHandlerStateTemplate")

RegisterStateDriver(frame, "petbattle", "[petbattle] dostuff1; [nopetbattle] dostuff2")

frame:SetAttribute("_onstate-petbattle", [[
         if (self:GetAttribute("state-petbattle") == "dostuff1") then
              --do stuff
         elseif (self:GetAttribute("state-petbattle") == "dostuff2") then
              -- do stuff
         end
]])