/** Accessing the document inside an iframe - bfults@gmail.com - 2005-02-02  **
 ** Code licensed under Creative Commons Attribution-ShareAlike License      **
 ** http://creativecommons.org/licenses/by-sa/2.0/                           **/
function changeFrame()
{
  var oIframe = document.getElementById('myframe');
  var oDoc = (oIframe.contentWindow || oIframe.contentDocument);
  if (oDoc.document) oDoc = oDoc.document;
  oDoc.body.style.backgroundColor = "#00f";
  return true;
}