Difference between $('selecttor')[0] ,$('selector').eq(index) in jquery
<p>What is the difference between <code>$('#div1 a')[0]</code> and <code>$('#div1 a').eq(0)</code> for the following markup</p>

<pre><code>&lt;div id="div1"&gt;
&lt;a href="#"&gt;click&lt;/a&gt;
&lt;/div&gt;.
</code></pre>

<p>Please Help.</p>
