local p = {}
function p.ISSN(frame)
id=frame.args.id
result=8*string.sub (id, 5 , 6)+7*string.sub (id, 6 , 7)+6*string.sub (id, 7 , 8)+5*string.sub (id, 8 , 9)+4*string.sub (id, 10 , 11)+3*string.sub (id, 11 , 12)+2*string.sub (id, 12 , 13)
result=11-result % 11
return result
end
return p
