html5 - html 5 web app cache download complete javascript alert? -

i'm creating basic offline web app using cache.manifest

but have under 5mb of cache downloading do. , wondering if there way of having popup alert runs once when cache download complete?

thanks

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i found debugger helps me debug wether have missed on manifest, don't know whether can in anyway?

<script>      var cachestatusvalues = [];     cachestatusvalues[0] = 'uncached';     cachestatusvalues[1] = 'idle';     cachestatusvalues[2] = 'checking';     cachestatusvalues[3] = 'downloading';     cachestatusvalues[4] = 'updateready';     cachestatusvalues[5] = 'obsolete';      var cache = window.applicationcache;     cache.addeventlistener('cached', logevent, false);     cache.addeventlistener('checking', logevent, false);     cache.addeventlistener('downloading', logevent, false);     cache.addeventlistener('error', logevent, false);     cache.addeventlistener('noupdate', logevent, false);     cache.addeventlistener('obsolete', logevent, false);     cache.addeventlistener('progress', logevent, false);     cache.addeventlistener('updateready', logevent, false);      function logevent(e) {         var online, status, type, message;         online = (navigator.online) ? 'yes' : 'no';         status = cachestatusvalues[cache.status];         type = e.type;         message = 'online: ' + online;         message+= ', event: ' + type;         message+= ', status: ' + status;         if (type == 'error' && navigator.online) {             message+= ' (prolly syntax error in manifest)';         }         console.log(message);     }      window.applicationcache.addeventlistener(         'updateready',          function(){             window.applicationcache.swapcache();             console.log('swap cache has been called');         },          false     );      setinterval(function(){cache.update()}, 10000);  </script> 

in order check when cache download complete, looking cached event. can checked similar 1 have above.

window.applicationcache.addeventlistener('cached', function() {     // need success     alert('i'm done!'); }, false );