title: use Jquery add size="5" into select
body: <p>I'm new to jQuery, I just wondering how to add size="5" into select. Many thanks.</p>
  
  <p>e.g. change</p>
  
  <pre><code>&lt;select&gt;
      &lt;option value="123"&gt;123&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>
  
  <p>into:</p>
  
  <pre><code>&lt;select size="5"&gt;
      &lt;option value="123"&gt;123&lt;/option&gt;
  &lt;/select&gt;
  </code></pre>