cache_manifest.js

try {
    var appCache = window.applicationCache;
    
    function handleCacheEvent(e){
        alert('Melding: ' + e);
    }
    
    function handleCacheError(e){
        alert('Error: ' + e);
    };
    
    // Fired after the first cache of the manifest.
    appCache.addEventListener('cached', handleCacheEvent, false);
    
    // Checking for an update. Always the first event fired in the sequence.
    appCache.addEventListener('checking', handleCacheEvent, false);
    
    // An update was found. The browser is fetching resources.
    appCache.addEventListener('downloading', handleCacheEvent, false);
    
    // The manifest returns 404 or 410, the download failed,
    // or the manifest changed while the download was in progress.
    appCache.addEventListener('error', handleCacheError, false);
    
    // Fired after the first download of the manifest.
    appCache.addEventListener('noupdate', handleCacheEvent, false);
    
    // Fired if the manifest file returns a 404 or 410.
    // This results in the application cache being deleted.
    appCache.addEventListener('obsolete', handleCacheEvent, false);
    
    // Fired for each resource listed in the manifest as it is being fetched.
    appCache.addEventListener('progress', handleCacheEvent, false);
    
    // Fired when the manifest resources have been newly redownloaded.
    appCache.addEventListener('updateready', handleCacheEvent, false);
} catch(e){
    alert("Geen applicationCache ondersteuning");
}