var head = document.getElementsByTagName('head');
var script = document.createElement('script');
script.type = "text/javascript";
script.src = "http://www.ikwa.com.br/users/info/" + user + ".xml?card_type=" + card_id;
head[0].appendChild(script);
var build_card = function build_card(response) {
  var card = document.getElementById('ikwa_card');
  card.innerHTML = response;
}