iterating over a hash backwards in js
<p><strong>So lets say I have a hash</strong></p>

<pre><code>a = { foo : "bar" , zap : "zip" , baz : "taz" }
</code></pre>

<p>I can interate over it like this</p>

<pre><code>for( var n in a ) {
 doSomething(a[n]);
}
</code></pre>

<p><em><strong>but I want to go backwards through it...</em></strong></p>

<p>thoughts on how to do this?</p>
