professional_javascript_for_web/ch23/IndexedDBExample01.htm

<!DOCTYPE html>
<html>
<head>
    <title>IndexedDB Example</title>
</head>
<body>
    <p>This example works in Firefox 4+ and Chrome. Note that Firefox does not allow local files to access <code>indexedDB</code>, so you'll need to run this example through a web server to get it to work on Firefox (Chrome does not have this restriction).</code></p>
    <script>
    (function(){
    
        var indexedDB = window.indexedDB || window.msIndexedDB || window.mozIndexedDB || window.webkitIndexedDB,
            request,
            database;
            
        request = indexedDB.open("admin");
        request.onerror = function(event){
            alert("Something bad happened while trying to open: " + event.target.errorCode);
        };
        request.onsuccess = function(event){
            database = event.target.result;
            initializeDatabase();
        };    
    
        function initializeDatabase(){
            if (database.version != "1.0"){
                request = database.setVersion("1.0");
                request.onerror = function(event){
                    alert("Something bad happened while trying to set version: " + event.target.errorCode);
                };
                request.onsuccess = function(event){
                    alert("Database initialization complete. Database name: " + database.name + ", Version: " + database.version);
                };
            } else {
                alert("Database already initialized. Database name: " + database.name + ", Version: " + database.version);
            }
        }
    
    })();

    </script>
</body>
</html>