III,
<!DOCTYPE html>
<html>
<head>
<title>Untitled</title>
<meta charset="utf-8">
<style type="text/css">
.ok{
width: 100px;
height: 100px;
background-image: url(https://www.katrins-zoooase.de/images/Fotolia_57528839_XS_png.png);
background-repeat: no-repeat;
background-size: contain;
}
.ok:after{
content: 'Нет';
color: #FFFFFF;
}
.ok.cat:after{
content: 'Да';
color: #000000;
}
.ok.cat{
background-image: url(https://cdn2.scratch.mit.edu/get_image/gallery/326029_170x100.png);
background-color: #FFFFFF;
}
</style>
</head>
<body>
<button class="ok" onclick="this.classList.toggle('cat')"></button>
</body>
</html>