CommonFun.NpcParam

function CommonFun.NpcParam(srcUser, targetUser, params, damageParam, logger)
  local NpcDamPer = 0
  local NpcResPer = 0
  if targetUser:GetNpcID() == 0 then
    NpcDamPer = srcUser:GetProperty("NpcDamPer")
    NpcResPer = targetUser:GetProperty("NpcResPer")
  end
  local A = 1 + NpcDamPer - NpcResPer
  if A <= 0.15 then
    A = 0.15
  end
  return A
end