hide all li elements and show the first 2 and toggle them by button
<p>hay assume i have</p>

<pre><code>&lt;ul&gt;
    &lt;li&gt;2&lt;/li&gt;
    &lt;li&gt;3&lt;/li&gt;
    &lt;li&gt;4&lt;/li&gt;
    &lt;li&gt;5&lt;/li&gt;
&lt;/ul&gt;
</code></pre>

<p>i want jquery code hide all <code>&lt;li&gt;</code> then show the fist and the second one
then <code>append()</code> an additional <code>&lt;li&gt;more&lt;/li&gt;</code> that is used to toggle the
hidden li.</p>
