ApplicationCache Updater

// allows user to update app at runtime when cache-manifest is changed on server
console.log("App cache status: " + getCacheStatus(window.applicationCache.status));
var updateCacheHandler = function() {
    if( confirm("Update available, update now?") ) {
        window.applicationCache.update();
        window.applicationCache.swapCache();
        window.location.reload(true);
    }
    window.applicationCache.removeEventListener('updateready', updateCacheHandler);
}
window.applicationCache.addEventListener('updateready', updateCacheHandler, false);


function getCacheStatus(status) {
    switch(status.toString()) {
        case "0" : return "UNCACHED";
        case "1" : return "IDLE";
        case "2" : return "CHECKING";
        case "3" : return "DOWNLOADING";
        case "4" : return "UPDATEREADY";
    }
    return null;
}