codice:
function cambiaAttributiATagObject(containerId, newObjectData, newObjectWidth, newObjectHeight, newParamValue)
{
  c = document.getElementById(containerId);
  o = c.childNodes[0];
  p = o.childNodes[0];
  o.setAttribute("data", newObjectData);
  o.setAttribute("width", newObjectWidth);
  o.setAttribute("height", newObjectHeight);
  p.setAttribute("value", newParamValue);
}