function ModifyText ()
{
 if (YD.hasClass(document.body, "gallery_http://ambassadorimagesonline.com/Comments/Guestbook/10949418_Jqxd4/1/764968512_6Vc4D")) 
  {
   var objElement = YD.get("comment")
   if (objElement != null) 
  {
   var str = new String(objElement.innerHTML);
   str = str.replace(/\gallery/gi, 'guestbook');
   objElement.innerHTML = str;
  }
 }
}

YE.onAvailable("comment", ModifyText);