Add event listener to embed JavaScript

Question

I'm trying to add an event listener to an embed object but still not success, this is the piece of bits I'm trying now.

var obj,
    url = "http://www.google.com",
    container = document.getElementById("contractFrameContainer");

obj = document.createElement('embed');
obj.setAttribute("type", "application/pdf");
obj.setAttribute("id", "pdf1");
obj.style.width = '100%';
obj.height = heightBody;
obj.setAttribute("src", url);       
obj.addEventListener("load", pdfLoad, false);

function pdfLoad() {
    // do something...
}

container.appendChild(obj);

PD: I'm using IE 11