Defining a Javascript prototype

Question

What are the functional differences between the following two Javascript prototypes, and are there any benefits for choosing one over the other?

Option 1:

Answer 1

Any existing instances of the constructor will continue pointing to the old prototype object. Any new instances created will point to the new prototype object.

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The advantages of option 1 over option 2 are simply that you don't have to re-establish constructor property and you save one indentation level which is huge for me.

To save repetition, I just assign the property to a local variable:

var method = Person.prototype;

method.getAge = function() {
    return this.age;
};

method.getName = function() {
    return this.name;
};

Also common choices are fn (jQuery) and p which are even shorter than method.