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<!DOCTYPE html>
<html>
<title>W3.JS</title>
<script src="http://www.sargonco.com/Uploads/Public/article/webdistut/javascript/w3.js"></script>
<body>
<p>Click the button to hide all elements with class="city".</p>
<button onclick="w3.hide('.city')">Hide</button>
<div id="London" class="city">
<h2>London</h2>
<p>London is the capital city of England.</p>
</div>
<div id="Paris" class="city">
<h2>Paris</h2>
<p>Paris is the capital of France.</p>
</div>
<div id="Tokyo" class="city">
<h2>Tokyo</h2>
<p>Tokyo is the capital of Japan.</p>
</div>
</body>
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Click the button to hide all elements with class="city".
London
London is the capital city of England.
Paris
Paris is the capital of France.
Tokyo
Tokyo is the capital of Japan.
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