title: find out object item names in as3
body: <p>let's say you're passing an object to a function</p>
  
  <pre><code>{title:"my title", data:"corresponding data"}
  </code></pre>
  
  <p>how can I get the function to know what the names of the items/sub-objects are (<code>title</code> and <code>data</code>) without specifying them?</p>