fhpmwa-localstorage.html

...
<input type="text" id="username">
...

fhpmwa-localstorage.js

$(document).ready(function() {
   var username = localStorage.getItem('username'); 
   if (username) $('#twitter_username').val(username); 
});
$('#twitter_username').change(function() {
   localStorage.setItem('username', $(this).val()); 
});

fhpmwa-serversidejsonstorage.html

...
<script src="jqtouch/jquery.js"></script>
<script src="jqtouch/jqtouch.js"></script>
<script src="json2.js"></script>
<script src="jquery.couch.js"></script>
<script src="app.js"></script>
...

fhpmwa-serversidejsonstorage.js

var db = $.couch.db('databasename');

var document = {
    'name': 'Philipp',
    'size': 185,
    'city': 'Berlin'
};

db.saveDoc(document, {
    'success': function() {
        alert('Document was successfully saved.');
    }
});

db.allDocs({
    'success': function(result) {
        for (var i in result.rows) {
            db.openDoc(result.rows[i].id, {
                'success': function(row) {
                    console.log(row.name + ', ' + row.city);
                }
            })
        }
    }
})

fhpmwa-web-sql-databases.js

var dbShortName = 'People';
var dbVersion = '1.0';
var dbDisplayName = 'People';
var dbMaxSize = 65536;
var db = openDatabase(dbShortName, dbVersion, dbDisplayName, dbMaxSize);

db.transaction(function(transaction) {
    transaction.executeSql(
        'CREATE TABLE IF NOT EXISTS people (' +
        '    id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,' +
        '    name VARCHAR(100) NOT NULL,' +
        '    age INTEGER' +
        ');'
    );
});

db.transaction(function(transaction) {
    transaction.executeSql(
        'INSERT INTO people ' +
        ' (name, age) ' +
        'VALUES ' +
        ' (?,?)'
    , ["Lena Meyer-Landrut", 18],
    function(transaction, result) {
        alert('Data successfully inserted.');
    },
    function(transaction, error) {
        alert('Oops. Error was "' + error.message + '" (Code: ' + error.code + ')');
        return true;
    });
});

db.transaction(function(transaction) {
    transaction.executeSql(
        'SELECT * FROM people ' +
        'WHERE age >= 18',
    null,
    function(transaction, result) {
        for (var i=0; i<result.rows.length; i++) {
            var row = result.rows.item(i);
            console.log(row);
        }
    },
    function(transaction, error) {
        alert('Oops. Error was "' + error.message + '" (Code: ' + error.code + ')');
        return true;
    });
});