<!DOCTYPE html>
<html>
<title>W3.CSS</title>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="/lib/w3.css">
<body>
<br>
<div class="w3-row-padding">
<div class="w3-container w3-third">
<img src="img_fjords.jpg" style="width:100%;cursor:pointer"
onclick="onClick(this)" class="w3-hover-opacity">
</div>
<div class="w3-container w3-third">
<img src="img_lights.jpg" style="width:100%;cursor:pointer"
onclick="onClick(this)" class="w3-hover-opacity">
</div>
<div class="w3-container w3-third">
<img src="img_mountains.jpg" style="width:100%;cursor:pointer"
onclick="onClick(this)" class="w3-hover-opacity">
</div>
</div>
<div id="modal01" class="w3-modal" onclick="this.style.display='none'">
<span class="w3-closebtn w3-hover-red w3-text-white w3-xxlarge w3-container w3-display-topright">×</span>
<div class="w3-modal-content w3-animate-zoom">
<img id="img01" style="width:100%">
</div>
</div>
<script>
function onClick(element) {
document.getElementById("img01").src = element.src;
document.getElementById("modal01").style.display = "block";
}
</script>
</body>
</html>