function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}

function addOnLoadScript(o)
{
  if (window.addEventListener) // W3C standard
  {  
    window.addEventListener('load', myFunction, false); // NB **not** 'onload'
  } 
  else if (window.attachEvent) // Microsoft
  {  
    window.attachEvent('onload', myFunction);
  }
}