<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<style>
img {
display: none;
width: 100px;
height: 100px;
}
input:checked + img {
display: block;
}
input {
position: absolute;
left: -9999px;
}
label {
cursor: pointer;
}
</style>
</head>
<body>
<div id="cont">
<input id="img1" name="img" type="radio" checked="checked">
<img src="./img1.png" style="background: red">
<input id="img2" name="img" type="radio">
<img src="./img2.png" style="background: black">
</div>
<div id="nav">
<label for="img1">第一張</label>
<label for="img2">第二張</label>
</div>
</body>
</html>
