function openNewWindow() 
{
  if (!document.getElementsByTagName) 
    return; 
  var anchors = document.getElementsByTagName("a"); 
  for (var i = 0; i < anchors.length; i++) 
  {
    var anchor = anchors[i]; 
    if (anchor.getAttribute("href") && anchor.getAttribute("rel") == "_blank") 
      anchor.target = "_blank"; 
  } 
}