title: Using Array.prototype.sort.call to sort a HTMLCollection
body: <pre><code>var down=function(a,b){alert(a)}
  Array.prototype.sort.call(table.tBodies[0].childNodes,down)
  Array.prototype.sort.call([0,1,2,3],down)
  </code></pre>
  
  <p>Why do I not get alerts from the first sort call?</p>