The Database object represents a lightweight relational database on the BlackBerry device. You use SQLite queries to retrieve, add, modify, and delete data.

You access the database using window.openDatabase() method. If the database with the given name doesn't already exist when openDatabase() is called, the browser creates it.

To create a database on a device, the device must have an microSD card mounted and available. When you create a database, the browser creates a database for an application in a domain-specific subfolder on the device SDCard.

The BlackBerry Browser follows the same-origin policy for allowing access to client-side databases. Web applications are only permitted to access those resources with the same scheme, domain, and port number, as the application. An application can access a database only by using path names that are relative to the origin domain. Applications cannot access databases using absolute path names.

The Storage object is used to storage a collection of key/value pairs.

Storage objects are instantiated as one of the following types:

• sessionStorage: Storage objects of this type let you to store data only for the duration of the current browser session. Once the session is closed on the device, the storage object and the data it contains is deleted.

• localStorage: Storage objects of this type let you store data that persists across browser sessions. When you create a new localStorage object, it is stored based on the origin domain of the original HTML document.

  The BlackBerry Browser follows the same-origin policy for allowing access to localStorage objects. Web applications are only permitted to access those objects with the same scheme, domain, and port number, as the application. An application can access a localStorage object only by using path names that are relative to the origin domain.

You can assign a key/value pair to a Storage object by using the setItem() method. For example:

localStorage.setItem("name1", value1);

Alternatively, you can index the objects directly using square brackets. For example:

localStorage["name1"] = value1;

The StorageEvent object extends the Event object and represents an event fired when a local or session storage area changes.