gistfile1.js

if (url) {
  console.log(url);

  $.ajax(url, {
    success: function(response) {
      popup.show(evt.coordinate, response);
    },
    error: function() {
      alert("Failed querying layer.");
    }
  });

  //var prettyCoord = ol.coordinate.toStringHDMS(ol.proj.transform(evt.coordinate, 'EPSG:3857', 'EPSG:4326'), 2);
 //popup.show(evt.coordinate, '<div><h2>Coordinates</h2><p>' + prettyCoord + '</p></div>');
 //var url = data.url + "&output=embed";
//  popup.show(evt.coordinate,'<iframe id="content" src="about:blank"></iframe>');
// $("#content").attr("src",url)
//   //popup.show(evt.coordinate,'<iframe seamless src="' + url + '"></iframe>');

 }
});