How to target child element in JavaScript : <p>How to target the img element in JavaScript to change img src. </p>

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<pre class="snippet-code-html lang-html prettyprint-override"><code>&lt;body&gt;
	&lt;div class="cover"&gt;
		&lt;img src="img.jpg" width="60" height="60"&gt;
	 &lt;/div&gt;
&lt;/body&gt;</code></pre>
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