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);
 }
}