function addLoadEvent(func) {
  var oldonload = window.onload;
  if (typeof window.onload != 'function') {
    window.onload = func;
  } else {
    window.onload = function() {
      if (oldonload) {
        oldonload();
      }
      func();
    }
  }
}
function poweredby() {
	var pb = document.createElement("div");
	pb.id = "powered-by-sector9";
	pb.style.position = "absolute";
	pb.style.top= "1px";
	pb.style.right = "1px";
	
	pb.innerHTML = '<a href="http://www.sector9.pt" target="_blank" title="Sector 9 - Tecnologias de Informa&ccedil;&atilde;o"><img src="http://www.sector9.pt/ext/img/poweredby.jpg" border="0" alt="Powered by Sector 9"/></a>';
	document.body.appendChild(pb); 
}
addLoadEvent(poweredby);