Declaring array of objects

I have a variable which is an array and I want every element of the array to act as an object by default. To achieve this, I can do something like this in my code.

var sample = new Array();
sample[0] = new Object();
sample[1] = new Object();

This works fine, but I don't want to mention any index number. I want all elements of my array to be an object. How do I declare or initialize it?

var sample = new Array();
sample[] = new Object();

I tried the above code but it doesn't work. How do I initialize an array of objects without using an index number?