Need Affiliate Cookie Dropper / Suffer Plugin - open to bidding

I need a WordPress plugin (php or Javascript based whatever ise secured). That I can use to load affiliate URL link in the background. This affiliate link should silently load on the background at the same time while main frontpage contents are loading. I have tried many ready to use plugins but they reveal IMg or Iframe code on source page which is not safe. So i need a plugin which can assign an affiliate link to every article on my blog and load affiliate link on background and disappear once it has stuffed affiliate cookie. If it's possible please let me know.