Hide a div element when other div is not found : <p>How can I hide a div element when a other div element with a specifiv ID is not found?</p>

<p>For example if this div is not found in the whole HTML-Code:</p>

<pre><code>&lt;div id="found"&gt;I'm here&lt;/div&gt;
</code></pre>

<p>then hide following div:</p>

<pre><code>&lt;div id="hide-me"&gt;Hello World&lt;/div&gt;
</code></pre>

<p>The best solution to solve this might be with a script</p>
