function pdfLinks()
{
  var links = document.getElementsByTagName('a');
  for (var i = 0; i < links.length; i++)
  {
    var a = links[i];
    if (!a.href)
    {
      continue;
    }
    if (a.href.indexOf('.pdf') != -1)
    {
      if ( a.firstChild == null || a.firstChild.nodeName.toLowerCase() != 'img')
      {
        if (a.className != "pdf")
        {
          addClass(a,'pdf');
        }            
      } 
    }
  }
}

//addLoadEvent(pdfLinks);