Preparation code

<script src="//ajax.googleapis.com/ajax/libs/jquery/1/jquery.min.js"></script>

<div id="cool">
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
<p>text</p>
</div>

Preparation code output

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Java applet disabled.

var x = document.getElementById("cool");
var y = x.getElementsByTagName("p")[0];

var x = document.getElementById("cool");
var y = x.firstChild; // this doesn't gives a p element

var x = document.getElementById("cool");
var y = x.firstElementChild;

var y = $('#cool').first();

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