Get the filename of applicationCache progress event

Question

The Chrome Developer tool displays on the console the name of the file being downloaded from the manifest. This occurs when the event window.applicationCache.onprogress fires. Is there away to get the filename that is been dwld with javascript? e.g. I would like something like this e.filename

window.applicationCache.onprogress=function(e) {
   if(e.lengthComputable){
      document.getElementById('progressBar').value=Math.round(e.loaded/e.total*100);
   }
   sideNotice=document.getElementById('sideNotice');
   sideNotice.innerHTML+="Downloading "+e.filename+"<br/>";
};