creating list of objects in Javascript

Is it possible to do create a list of your own objects in Javascript? This is the type of data I want to store :

Date : 12/1/2011   Reading : 3   ID : 20055    
Date : 13/1/2011   Reading : 5   ID : 20053    
Date : 14/1/2011   Reading : 6   ID : 45652

var list = [
    { date: '12/1/2011', reading: 3, id: 20055 },
    { date: '13/1/2011', reading: 5, id: 20053 },
    { date: '14/1/2011', reading: 6, id: 45652 }
];

and then access it:

alert(list[1].date);

dynamically build list of objects

var listOfObjects = [];
var a = ["car", "bike", "scooter"];
a.forEach(function(entry) {
    var singleObj = {};
    singleObj['type'] = 'vehicle';
    singleObj['value'] = entry;
    listOfObjects.push(singleObj);
});

here's a working example http://jsfiddle.net/b9f6Q/2/ see console for output