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<html><html><title>W3.JS</title><script src="https://www.w3schools.com/lib/w3.js"></script><body><p>Click the button to hide the element with id="London".</p><button onclick="w3.hide('#London')">Hide London</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></html><title>W3.JS</title><script src="https://www.w3schools.com/lib/w3.js"></script><body><button onclick="w3.hide('p')">Hide all p elements</button><h2>London</h2><p>London is the capital city of England.</p><p>It is the most populous city in the United Kingdom.</p><p>Population over 13 million inhabitants.</p></body></html>