function detectPopupBlocker() {
  var myTest = window.open("about:blank","","directories=no,height=100,width=100,menubar=no,resizable=no,scrollbars=no,status=no,titlebar=no,top=0,location=no");
  if (!myTest) {
    return true;
  } else {
    myTest.close();
    return false;
  }
}