Where to declare class constants?

Question

I\'m using class members to hold constants. E.g.:

function Foo() {
}

Foo.CONSTANT1 = 1;
Foo.CONSTANT2 = 2;

This works fine, except that it see

Answer 1

IF the constants are to be used inside of the object only:

function Foo() {
    var CONSTANT1 = 1,CONSTANT2 = 2;
}

If not, do it like this:

function Foo(){
    this.CONSTANT1=1;
    this.CONSTANT2=2;
}

It's much more readable and easier to work out what the function does.