<!DOCTYPE html>
<html>
<head>
<style>
.dropdown {
position: relative;
display: inline-block;
}
.dropdown-content {
display: none;
position: absolute;
background-color: #f9f9f9;
min-width: 160px;
box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
z-index: 1;
}
.dropdown:hover .dropdown-content {
display: block;
}
.opa:hover {
opacity: 0.3;
}
/* why not work? Thanks */
.dropdown-content:hover .opa {
opacity: 0.3;
}
.desc {
padding: 15px;
text-align: center;
}
</style>
</head>
<body>
<h2>Dropdown Image</h2>
<p>Move the mouse over the image below to open the dropdown content.</p>
<div class="dropdown">
<img class="opa" src="img_fjords.jpg" alt="Trolltunga Norway" width="100" height="50">
<div class="dropdown-content">
<img src="img_fjords.jpg" alt="Trolltunga Norway" width="300" height="200">
<div class="desc">Beautiful Trolltunga, Norway</div>
</div>
</div>
</body>
</html>
