HTML5のlocalStorageにオブジェクトを格納するサンプルコード

var testObject = { 'one': 1, 'two': 2, 'three': 3 }
console.log('typeof testObject: ' + typeof testObject);
console.log('testObject properties: ');
for (var prop in testObject) {
    console.log(' ' + prop + ': ' + testObject[prop]);
}

// Put the object into storage
localStorage.setItem('testObject', testObject);

// Retrieve the object from storage
var retrievedObject = localStorage.getItem('testObject');

console.log('typeof retrievedObject: ' + typeof retrievedObject);
console.log('Value of retrievedObject: ' + retrievedObject);

var testObject = { 'one': 1, 'two': 2, 'three': 3 };

// Put the object into storage
localStorage.setItem('testObject', JSON.stringify(testObject));

// Retrieve the object from storage
var retrievedObject = localStorage.getItem('testObject');

console.log('retrievedObject: ', JSON.parse(retrievedObject));