What do { and } mean inside params?
<p>Take the example:</p>

<blockquote>
  <p><code>$.ajax({lhs:val});</code></p>
</blockquote>

<p>What does the <code>{}</code> do? As far as I know, there's no named parameters -- so is this an actual member (same as <code>$.ajax.lhs</code>)? What does it mean and what does it do?</p>
