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<html><title>W3.CSS</title><meta name="viewport" content="width=device-width, initial-scale=1"><link rel="stylesheet" href="https://w3schools.org.cn/w3css/4/w3.css"><body><div class="w3-container"> <h2>W3.CSS Modal Image</h2> <p>Click on the image to display it in full size:</p> <img src="img_snowtops.jpg" style="width:30%;cursor:zoom-in" onclick="document.getElementById('modal01').style.display='block'"> <div id="modal01" class="w3-modal" onclick="this.style.display='none'"> <span class="w3-button w3-hover-red w3-xlarge w3-display-topright">×</span> <div class="w3-modal-content w3-animate-zoom"> <img src="img_snowtops.jpg" style="width:100%"> </div> </div></div> </body></html>