Array.sort() doesn't sort numbers correctly
<p>In Chrome 14, and Firefox 5 (haven't tested other browsers), the following code doesn't sort the numbers correctly:</p>

<pre><code>&lt;script&gt;
a = new Array();
a.push(10);
a.push(60);
a.push(20);
a.push(30);
a.push(100);


document.write(a.sort())
&lt;/script&gt;
</code></pre>

<p>It returns 10,100,20,30,60</p>

<p>I've tried different numbers, and it always acts as if the 0s aren't there and sorts the numbers correctly otherwise. Anyone know why?</p>
