function addLoadEvent(func) {

  var oldonload = window.onload;

  if (typeof window.onload != 'function') {

    window.onload = func;

  } else {

     window.onload = function() {

      oldonload();

      func();

    }

  }

}

function insertAfter(newElement, targetElement) {

  var parent = targetElement.parentNode;

  if (parent.lastChild == targetElement) {

    parent.appendChild(newElement);

  } else {

    parent.insertBefore(newElement, targetElement.nextSibling);

  }

}