title: how to focus an "anchor" element?
body: <p>I want to make an <code>a</code> element to gain focus, then press <kbd>Enter</kbd> to open the link.</p>
  <p><code>&lt;a id='link'&gt;test&lt;/a&gt;</code></p>
  <p>I use <code>$(&quot;#link&quot;).focus()</code>, but it doesn't work.</p>
  <p>How can I do this?</p>