function createDatabase() {

  if (!window.indexedDB) {

    window.alert("Your browser doesn't support a stable version of IndexedDB. Such and such feature will not be available.");

}

// This is what our customer data looks like.

var customerData = [

  { ssn: "444-44-4444", name: "Bill", age: 35, email: "bill@company.com" },

  { ssn: "555-55-5555", name: "Donna", age: 32, email: "donna@home.org" }

];

var dbName = "CustomerDB";

// Open database with version=2. Use integer valueonly ! Not 1.1, 1.2 etc.

var request = indexedDB.open(dbName, 2);

request.onerror = function(event) {

  // Handle errors.

  console.log("request.onerror errcode=" + event.target.error.name);

};

request.onupgradeneeded = function(event) {

  console.log("request.onupgradeneeded, we are creating a new version of the dataBase");

  var db = event.target.result;

  // Create an objectStore to hold information about our customers. We're

  // going to use "ssn" as our key path because it's guaranteed to be

  // unique.

  var objectStore = db.createObjectStore("customers", { keyPath: "ssn" });

  // Create an index to search customers by name. We may have duplicates

  // so we can't use a unique index.

  objectStore.createIndex("name", "name", { unique: false });

  // Create an index to search customers by email. We want to ensure that

  // no two customers have the same email, so use a unique index.

  objectStore.createIndex("email", "email", { unique: true });

  // Store values in the newly created objectStore.

  for (var i in customerData) {

    objectStore.add(customerData[i]);

  }

};

  request.onsuccess = function(event) {

  console.log("request.onsuccess, database opened, now we can add / remove / look for data in it!");

    // The result is the database itself

  var db = event.target.result;  

};

}