Javascript - difference between namespace vs. closure?

Question

In Javascript, what\'s the difference between a namespace and a closure? They seem very similar to me.

EDIT

Specifically, this article discusses namesp

Answer 1

A namespace is typically a method of putting all your global variables as properties under one master global variable, thus only adding one new truly top-level global variable. It prevents pollution of the global namespace and reduces the chance of conflict with other global variables.

And example of a namespace:

var YUI = {};
YUI.one = function(sel) {...};
YUI.two = function(sel) {...};
YUI.three = function(sel) {...};

There is one new item in the top-level global namespace YUI, but there are multiple globally accessible items via the YUI namespace object.

A closure is a function block that lasts beyond the normal finish of the execution of the function because of lasting references to internal parts of the function.

function doSometing() {
    var x = 10;
    setTimer(function() {
        // this gets called after doSomething() has finished executing
        // but because of the function closure, the variables 
        // inside of the parent scope like x are still accessible
        x += 10;
    }, 1000);
}