function isFF() {
   if (navigator.userAgent.indexOf("Firefox") > -1) return true;
   return false;
}
function downloadLinkClicked() {

   document.location = downloadLink;

   var cnFrm;
   if ((CN!="") && (CN!=null)) {
	   if (isFF()) {
		  cnFrm = window.frames["cnFrm"];
		  cnFrm.location = "/"+ CN +".html"; 
	   } else {
		  cnFrm = document.getElementById("cnFrm");
		  cnFrm.src = "/"+ CN +".html"; 
	   }
   }
}