Ramraghav
Thanks a lot.So, purananooru mentions ramayana too long before Ilango Adikal!!!
Please see the link
http://www.geocities.com/promiserani2/c1473.html
where the song "Vadavarayai mathaki" is explained by ilango adikal.
Lot of stories associated to Lord Krishna is known by Ilango Adikal.He must have known the Bhagavatham very well indeed.And he denotes Krishna as God inspite of modern scholars calling him a Jain monk!