gistfile1.js

// From http://developer.yahoo.com/yui/3/examples/overlay/overlay-io-plugin.html
YUI3.use('overlay', 'io', function(Y) {
  
  function Lightbox(config) {
    arguments.callee.superclass.constructor.call(this, config);
  };
  Lightbox.NAME = "lightbox";
  Lightbox.NS = "lightbox";

  Y.extend(Lightbox, Y.Overlay, {
    syncUI: function() {
      var cfg = {on: {}};
      cfg.on.success = Y.bind(this._ioSuccess, this);
      cfg.method = "GET";

      console.log("Making request!");
      Y.io(this.get("uri"), cfg);
    },
    _ioSuccess: function(id, o) {
      console.log("Got content!");
      this.set('bodyContent', o.responseText);
    }
  });

  window.Lightbox = Lightbox;
});