var json = '[{\"code\":\"<\\/a>\"},{\"code\":\"<\\/a>\"},{\"code\":\"<\\/a>\"},{\"code\":\"<\\/a>\"},{\"code\":\"<\\/a>\"},{\"code\":\"<\\/a>\"}]';
var offers = JSON.parse(json);
var offer = offers[Math.floor(Math.random() * offers.length)];
document.write(offer.code);